creator
type: AnnotationProperty

description
type: AnnotationProperty

license
type: AnnotationProperty

modified
type: AnnotationProperty

title
type: AnnotationProperty

created on
type: AnnotationProperty
comment: The date and time when the resource was created.
range: dateTime

last updated on
type: AnnotationProperty
comment: The date and time when the resource was last updated.
label: lastUpdateOn
range: dateTime

version
type: AnnotationProperty
comment: The version identifier of the resource.
range: string

InanimatePhysicalObject
type: Class

Organization
type: Class

System
type: Class
comment: A system is a complex of functional parts working together. Each part contributes to the realisation of the system's function (though not necessarily every part in every performance of the system).

connectedTo
type: ObjectProperty
type: SymmetricProperty
equivalent entity ISO15926: ConnectionOfIndividual
equivalent entity ISO15926: connectedTo
domain: Auxiliary Load
domain: Auxiliary Engine System
domain: Bidirectional Converter System
domain: Bow Thruster
domain: Electric Motor System
domain: Emergency Equipment
domain: Energy Storage System
domain: Frequency Converter System
domain: Fuel Cell System
domain: Gate Rudder
domain: Generator Set System
domain: Maneuvering
domain: On Shore Power
domain: Selective Catalytic Reduction
domain: Shaft Generator System
range: Bidirectional Converter System
range: Electric Motor System
range: Energy Storage System
range: Frequency Converter System
range: Generator Set System
range: PMS

directly connected to
type: ObjectProperty
type: SymmetricProperty
equivalent entity ISO15926: DirectConnection
equivalent entity ISO15926: directlyConnectedTo
comment: Relates two inanimate physical objects that are directly connected.
domain: InanimatePhysicalObject
domain: Electric Motor Shaft
domain: Electric Motor System
domain: Main Engine System
domain: Power Take-Off
domain: Propeller System
label: directlyConnectedTo
range: InanimatePhysicalObject
range: Electric Motor Shaft
range: Electric Motor System
range: Gearbox System
range: Propeller System
sub property of: connectedTo

partOf
type: ObjectProperty
equivalent entity ISO15926: CompositionOfIndividual
equivalent entity ISO15926: partOf
domain: Auxiliary Load
domain: Auxiliary Engine System
domain: Bidirectional Converter System
domain: Boiler
domain: Bow Thruster
domain: Efficiency Enhancement System
domain: Electric Motor Shaft
domain: Electric Motor System
domain: Emergency Equipment
domain: Energy Storage System
domain: Engine System
domain: Frequency Converter System
domain: Fuel Cell System
domain: Gate Rudder
domain: Gearbox System
domain: Maneuvering
domain: On Shore Power
domain: Power Take-Off
domain: PMS
domain: Propeller System
domain: Selective Catalytic Reduction
domain: Shaft Generator System
range: Vessel System

dateTime
type: Datatype

double
type: Datatype

integer
type: Datatype

string
type: Datatype

altLabel
type: AnnotationProperty
comment: Alternative label for the ontology resource.
comment: An alternative lexical label for a resource.
label: alternative label

notation
type: AnnotationProperty
comment: A notation, such as a code or identifier, used to uniquely identify a concept.

Alternating Current
type: Class
comment: Classifies an electrical system or component as using alternating current (AC).
subclass of: TwinShip Inanimate Physical Object

Ammonia
type: NamedIndividual
type: Fuel
comment: Ammonia fuel. A zero-carbon fuel option for maritime applications.
twinship fuel LHV kJ per kg: 18600.0

Auxiliary Load
type: Class
comment: Auxiliary electrical loads including ship services and hotel load. Represents the non-propulsion electrical demand on the power management system.
subclass of: Energy System

Air Lubrication System
type: Class
comment: Reduces hull friction by creating a layer of air bubbles under the hull, improving fuel efficiency.
subclass of: Efficiency Enhancement System

Auxiliary Engine System
type: Class
comment: Auxiliary engine system for power generation. Typically diesel engines, so individuals are often typed as both AuxiliaryEngineSystem and DieselEngine.
subclass of: Engine System

Bio-fuel
type: NamedIndividual
type: Fuel
comment: Bio-diesel / Bio-fuel. A renewable fuel alternative for maritime applications.
twinship fuel LHV kJ per kg: 40000.0

Bidirectional Converter System
type: Class
comment: DC bus bidirectional converter that converts between AC and DC power, enabling charging and discharging of energy storage systems through the main switchboard.
subclass of: Energy System

Boiler
type: Class
comment: A vessel's boiler system for generating steam.
subclass of: TwinShip Inanimate Physical Object

Bow
type: Class
comment: Classifies a thruster or maneuvering device as bow-mounted.
subclass of: TwinShip Inanimate Physical Object

Bow Thruster
type: Class
comment: A dedicated bow thruster for vessel maneuvering. Uses existing bow thruster datatype properties.
subclass of: Maneuvering

Controllable Pitch Propeller
type: Class
comment: Controllable Pitch Propeller - a propeller where the blade pitch can be adjusted while rotating to optimize thrust and efficiency.
subclass of: Propeller System

Direct Current
type: Class
comment: Classifies an electrical system or component as using direct current (DC).
subclass of: TwinShip Inanimate Physical Object

Diesel-Electric Configuration
type: Class
comment: Classifies a diesel-electric propulsion configuration where engines drive generators to produce electricity, which then powers electric motors for propulsion. Counterpart to MechanicalConfiguration for conventional direct-drive or geared propulsion.
subclass of: TwinShip Inanimate Physical Object

Diesel Engine
type: Class
comment: A diesel-powered internal combustion engine.
subclass of: Engine System

Direct Drive
type: Class
comment: A direct drive mechanism where the engine is directly coupled to the propeller shaft without a reduction gearbox.
subclass of: Gearbox System

Dynamic Wing
type: Class
comment: Active aerodynamic or hydrodynamic drag reduction device for improving vessel efficiency.
subclass of: Efficiency Enhancement System

Energy Storage Device
type: Class
comment: Classifies a component as an energy storage device, capable of storing and releasing electrical energy.
subclass of: TwinShip Inanimate Physical Object

Efficiency Enhancement System
type: Class
comment: Base class for systems that improve vessel efficiency without generating primary propulsion power. Includes wind-assisted propulsion, air lubrication, and aerodynamic/hydrodynamic devices.
subclass of: TwinShip Inanimate Physical Object

Electric Motor Shaft
type: Class
comment: The propulsion shaft connecting an electric motor to a propeller. Carries shaft speed and torque properties.
subclass of: TwinShip Inanimate Physical Object

Electric Motor System
type: Class
comment: AC electric motor that drives a propeller via a shaft. The diesel-electric equivalent of MainEngineSystem in the propulsion chain.
subclass of: TwinShip Inanimate Physical Object

Emergency Equipment
type: Class
comment: Equipment designated for emergency use.
subclass of: TwinShip Inanimate Physical Object

Emission Reduction
type: Class
comment: Classifies a component as an emissions reduction system (e.g., SCR, scrubbers, carbon capture).
subclass of: TwinShip Inanimate Physical Object

Energy Storage System
type: Class
comment: Battery or hybrid energy storage providing peak power, backup, and load balancing for diesel-electric vessels. Connected to the main switchboard via a bidirectional converter.
subclass of: Energy System

Energy System
type: Class
comment: A system that manages or distributes energy on a vessel (e.g., PMS, shaft generators, electrical distribution).
subclass of: TwinShip Inanimate Physical Object

Engine System
type: Class
comment: A machine that converts energy into mechanical motion.
subclass of: TwinShip Inanimate Physical Object

Fixed Pitch Propeller
type: Class
comment: Fixed Pitch Propeller - a propeller with blades permanently set at a fixed angle.
subclass of: Propeller System

Fleet
type: Class
comment: A collection of ships operated by the same organization.
subclass of: TwinShip System

Four Stroke
type: Class
comment: A four-stroke internal combustion engine.
subclass of: Engine System

Frequency Converter System
type: Class
comment: Converts DC/AC electrical power to the frequency needed by electric motors in a diesel-electric propulsion system.
subclass of: Energy System

Fuel
type: Class
comment: Fuel type (e.g., HFO, MGO, MDO). Defined as individuals to allow engines and components to reference specific fuel types via the consume property.
subclass of: TwinShip Inanimate Physical Object

Fuel Cell System
type: Class
comment: Fuel cell system for supplementary or backup power generation. Converts chemical energy from fuel (e.g., ammonia, hydrogen) directly into electrical energy.
subclass of: Energy System

Gate Rudder
type: Class
comment: A combined rudder and propulsion enhancement device. Unlike traditional rudders, gate rudders provide both steering and thrust augmentation.
subclass of: Maneuvering

Gearbox System
type: Class
comment: A mechanical device for transmitting and modifying rotational motion. Subclasses include DirectDrive, Reduction, SingleSpeed, and TISO (Twin-In Single-Out).
subclass of: TwinShip Inanimate Physical Object

Generator Set System
type: Class
comment: An integrated engine and generator unit that produces electrical power. The diesel-electric equivalent of MainEngineSystem — its primary purpose is electrical energy production rather than mechanical propulsion. Subclass of EngineSystem because it is physically a diesel engine that consumes fuel and has combustion/shaft properties.
subclass of: Engine System

Hotel Load
type: Class
comment: Classifies a load as hotel load (HVAC, lighting, galley, passenger comfort systems, etc.).
subclass of: TwinShip Inanimate Physical Object

Main Engine System
type: Class
comment: Main propulsion engine system. Includes shaft-related properties (power, torque, speed) as the main engine drives the propeller shaft.
subclass of: Engine System

Maneuvering
type: Class
comment: Equipment used for vessel maneuvering, such as bow and stern thrusters.
subclass of: TwinShip Inanimate Physical Object

Mechanical Configuration
type: Class
comment: Classifies the mechanical configuration or arrangement of an engine (e.g., inline, V-type, opposed). Used alongside stroke type classifications.
subclass of: TwinShip Inanimate Physical Object

On Shore Power
type: Class
comment: Shore power connection for zero-emission port operations. Allows a vessel to receive electrical power from the shore grid.
subclass of: Energy System

Organization
type: Class
comment: An organized group of people with a particular purpose, such as a shipping company or vessel operator.
subclass of: TwinShip Organization

Power Take-Off
type: Class
comment: Power Take-Off - a component or system that derives power from the main propulsion system.
subclass of: TwinShip Inanimate Physical Object

PMS
type: Class
comment: Power Management System - manages electrical power distribution on a vessel.
subclass of: Energy System

Propeller System
type: Class
comment: A rotating device with blades that converts rotational motion into thrust. Subclasses: CPP (Controllable Pitch Propeller) and FPP (Fixed Pitch Propeller).
subclass of: TwinShip Inanimate Physical Object

Reduction Gearbox Shaft Generator
type: Class
comment: A shaft generator connected to a reduction gearbox via power take-off (PTO). Generates electrical power from the main propulsion system.
subclass of: Shaft Generator System

Reduction
type: Class
comment: A reduction gearbox that reduces input speed to output speed.
subclass of: Gearbox System

Roll-on/Roll-off PAXengers
type: Class
comment: Roll-on/Roll-off Passenger vessel - a ferry that carries both vehicles and passengers.
subclass of: Vessel System

Roll-on/Roll-off
type: Class
comment: Roll-on/Roll-off vessel - a cargo ship designed to carry wheeled cargo that is driven on and off the ship.
subclass of: Vessel System

Selective Catalytic Reduction
type: Class
comment: Selective Catalytic Reduction (SCR) system for NOx emissions reduction using a catalytic process.
subclass of: Emission Reduction

Shaft Generator System
type: Class
comment: A generator that derives power from the propulsion shaft. Subclass RGShaftGenerator is connected via reduction gearbox with PTO (Power Take-Off).
subclass of: Energy System

Ship Services
type: Class
comment: Classifies a load as ship services (navigation, machinery support, safety systems, etc.).
subclass of: TwinShip Inanimate Physical Object

Single Speed
type: Class
comment: A single-speed gearbox with a fixed gear ratio.
subclass of: Gearbox System

Suction Sail
type: Class
comment: Classifies a wind-assisted propulsion system as a suction sail (Flettner rotor or similar technology).
subclass of: TwinShip Inanimate Physical Object

TISO
type: Class
comment: Twin-In Single-Out gearbox - combines power from two engines to a single output shaft.
subclass of: Gearbox System

Tanker
type: Class
comment: A vessel designed for transporting liquid cargo in bulk, such as oil, chemicals, or liquefied gas.
subclass of: Vessel System

TwinShip Data Properties
type: DatatypeProperty
comment: Parent property for all TwinShip-specific datatype properties. All measurement and data properties should be subproperties of this.

TwinShip Inanimate Physical Object
type: Class
comment: Base class for all physical objects in the TwinShip ontology. Subclass of IDO InanimatePhysicalObject. All vessel systems, components, and physical entities extend this class.
subclass of: InanimatePhysicalObject

TwinShip Organization
type: Class
comment: Base class for all organizations in the TwinShip ontology. Subclass of IDO Organization.
subclass of: Organization

TwinShip System
type: Class
comment: Base class for all systems in the TwinShip ontology. Subclass of IDO System.
subclass of: System

Two Stroke
type: Class
comment: A two-stroke internal combustion engine.
subclass of: Engine System

Vessel System
type: Class
comment: A maritime vessel.
subclass of: TwinShip Inanimate Physical Object

Wind Assisted Propulsion System
type: Class
comment: Wind-assisted propulsion system (WASP) such as suction sails or rotor sails that harness wind energy to supplement vessel propulsion.
subclass of: Efficiency Enhancement System

component of
type: ObjectProperty
comment: Relates a component to the ship or system it is part of.
sub property of: partOf
inverse of: has component

consumes
type: ObjectProperty
comment: Relates an engine or system to the fuel it consumes.
domain: Boiler
domain: Engine System
domain: Fuel Cell System
range: Fuel
sub property of: twinship object properties

has component
type: ObjectProperty
comment: Relates a ship or system to a component that is part of it.
sub property of: hasPart

owned by
type: ObjectProperty
comment: Relates an entity to its owner (typically an Organization).
sub property of: twinship object properties

twinship ALS power in kW
type: DatatypeProperty
comment: Air Lubrication System power in kilowatts. Value -1 indicates unknown.
domain: Air Lubrication System
range: double
sub property of: twinship power max in kW

twinship ALS power reduction efficiency percentage
type: DatatypeProperty
comment: Air Lubrication System power reduction efficiency as a percentage. Value -1 indicates unknown.
domain: Air Lubrication System
range: double
sub property of: TwinShip Data Properties

twinship AMMCELL power capacity in KWh
type: DatatypeProperty
comment: Ammonia fuel cell power capacity in kilowatt-hours. Value -1 indicates unknown.
domain: Fuel Cell System
range: double
sub property of: twinship power max in kW

twinship AUXLD hotel load power in kW
type: DatatypeProperty
comment: Auxiliary load hotel load power demand in kilowatts. Value -1 indicates unknown.
domain: Auxiliary Load
range: double
sub property of: twinship power max in kW

twinship AUXLD ship services power in kW
type: DatatypeProperty
comment: Auxiliary load ship services power demand in kilowatts. Value -1 indicates unknown.
domain: Auxiliary Load
range: double
sub property of: twinship power max in kW

twinship auxiliary DO mode
type: DatatypeProperty
comment: Diesel Oil mode for auxiliary engine. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Auxiliary Engine System
range: integer
sub property of: twinship DO mode

twinship auxiliary fuel rate mass net kg per hr
type: DatatypeProperty
comment: Net fuel consumption rate for auxiliary engine in kg per hour. Value -1 indicates unknown.
domain: Auxiliary Engine System
range: double
sub property of: TwinShip Data Properties

twinship BLR fuel mode
type: DatatypeProperty
comment: Boiler fuel mode indicator. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: TwinShip Data Properties

twinship boiler BLR fuel mode
type: DatatypeProperty
comment: Boiler BLR fuel mode for boiler system. Inherits semantics from twBLRFuelMode.
domain: Boiler
range: integer
sub property of: twinship BLR fuel mode

twinship boiler DO temperature in degrees C
type: DatatypeProperty
comment: Boiler Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship DO temperature in degrees C

twinship boiler DO temperature return in degrees C
type: DatatypeProperty
comment: Boiler DO temperature return in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship DO temperature in degrees C

twinship boiler DO vol in litre per hr
type: DatatypeProperty
comment: Boiler Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship DO vol in litre per hr

twinship boiler DO vol return in litre per hr
type: DatatypeProperty
comment: Boiler DO volume return in litres per hour. Value -1 indicates unknown.
sub property of: twinship DO vol in litre per hr

twinship boiler emergency DO mode
type: DatatypeProperty
comment: Boiler emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Boiler
range: double
range: integer
sub property of: twinship emergency DO mode

twinship boiler fuel temp in degrees C
type: DatatypeProperty
comment: Boiler fuel temperature in degrees Celsius. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship fuel temp in degrees C

twinship boiler fuel vol litre per hr
type: DatatypeProperty
comment: Boiler fuel volume flow in litres per hour. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship fuel vol litre per hr

twinship boiler MGO in use
type: DatatypeProperty
comment: Indicates if boiler is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
domain: Boiler
range: integer
sub property of: twinship MGO in use

twinship boiler MGO mass in kg per hr
type: DatatypeProperty
comment: Boiler Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship MGO mass in kg per hr

twinship boiler mass in kg per hr
type: DatatypeProperty
comment: Boiler fuel mass flow in kg per hour. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship emergency mass in kg per hr

twinship boiler power max in kW
type: DatatypeProperty
comment: Maximum boiler power output in kilowatts. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship power max in kW

twinship boiler speed max in rev per min
type: DatatypeProperty
comment: Maximum boiler motor speed in revolutions per minute. Value -1 indicates unknown.
domain: Boiler
range: double
sub property of: twinship speed max in rev per min

twinship bow thruster BLR fuel mode
type: DatatypeProperty
comment: Bow thruster BLR fuel mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship BLR fuel mode

twinship bow thruster DO temperature in degrees C
type: DatatypeProperty
comment: Bow thruster Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship DO temperature in degrees C

twinship bow thruster DO vol in litre per hr
type: DatatypeProperty
comment: Bow thruster Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship DO vol in litre per hr

twinship bow thruster emergency DO mode
type: DatatypeProperty
comment: Bow thruster emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship emergency DO mode

twinship bow thruster fuel temp in degrees C
type: DatatypeProperty
comment: Bow thruster fuel temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship fuel temp in degrees C

twinship bow thruster fuel vol litre per hr
type: DatatypeProperty
comment: Bow thruster fuel volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship fuel vol litre per hr

twinship bow thruster MGO in use
type: DatatypeProperty
comment: Indicates if bow thruster is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
sub property of: twinship MGO in use

twinship bow thruster MGO mass in kg per hr
type: DatatypeProperty
comment: Bow thruster Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship MGO mass in kg per hr

twinship bow thruster mass in kg per hr
type: DatatypeProperty
comment: Bow thruster fuel mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship emergency mass in kg per hr

twinship bow thruster power max in kW
type: DatatypeProperty
comment: Maximum bow thruster power output in kilowatts. Value -1 indicates unknown.
domain: Bow Thruster
range: double
sub property of: twinship power max in kW

twinship bow thruster speed max in rev per min
type: DatatypeProperty
comment: Maximum bow thruster motor speed in revolutions per minute. Value -1 indicates unknown.
domain: Bow Thruster
range: double
sub property of: twinship speed max in rev per min

twinship common DO mode
type: DatatypeProperty
comment: Common Diesel Oil mode across systems. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Main Engine System
range: integer
sub property of: twinship DO mode

twinship common fuel mode
type: DatatypeProperty
description: A code representing the type of bunkered fuel.
source: www.imo.org
comment: Common fuel mode indicator across systems. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Main Engine System
range: integer
sub property of: TwinShip Data Properties
alternative label: Fuel type, coded
notation: IMO0654

twinship composite exhaust gas boiler BLR fuel mode
type: DatatypeProperty
comment: Composite exhaust gas boiler BLR fuel mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship BLR fuel mode

twinship composite exhaust gas boiler DO temperature in degrees C
type: DatatypeProperty
comment: Composite exhaust gas boiler Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship DO temperature in degrees C

twinship composite exhaust gas boiler DO vol in litre per hr
type: DatatypeProperty
comment: Composite exhaust gas boiler Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship DO vol in litre per hr

twinship composite exhaust gas boiler emergency DO mode
type: DatatypeProperty
comment: Composite exhaust gas boiler emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship emergency DO mode

twinship composite exhaust gas boiler fuel temp in degrees C
type: DatatypeProperty
comment: Composite exhaust gas boiler fuel temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship fuel temp in degrees C

twinship composite exhaust gas boiler fuel vol litre per hr
type: DatatypeProperty
comment: Composite exhaust gas boiler fuel volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship fuel vol litre per hr

twinship composite exhaust gas boiler MGO in use
type: DatatypeProperty
comment: Indicates if composite exhaust gas boiler is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
sub property of: twinship MGO in use

twinship composite exhaust gas boiler MGO mass in kg per hr
type: DatatypeProperty
comment: Composite exhaust gas boiler Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship MGO mass in kg per hr

twinship composite exhaust gas boiler mass in kg per hr
type: DatatypeProperty
comment: Composite exhaust gas boiler fuel mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship emergency mass in kg per hr

twinship composite exhaust gas boiler power max in kW
type: DatatypeProperty
comment: Maximum composite exhaust gas boiler power output in kilowatts. Value -1 indicates unknown.
sub property of: twinship power max in kW

twinship composite exhaust gas boiler speed max in rev per min
type: DatatypeProperty
comment: Maximum composite exhaust gas boiler motor speed in revolutions per minute. Value -1 indicates unknown.
sub property of: twinship speed max in rev per min

twinship DCB max current
type: DatatypeProperty
comment: DC bus maximum current. Value -1 indicates unknown.
domain: Bidirectional Converter System
range: double
sub property of: TwinShip Data Properties

twinship DCB max voltage
type: DatatypeProperty
comment: DC bus maximum voltage. Value -1 indicates unknown.
domain: Bidirectional Converter System
range: double
sub property of: TwinShip Data Properties

twinship DCB min voltage
type: DatatypeProperty
comment: DC bus minimum voltage. Value -1 indicates unknown.
domain: Bidirectional Converter System
range: double
sub property of: TwinShip Data Properties

twinship DCB nominal voltage
type: DatatypeProperty
comment: DC bus nominal voltage. Value -1 indicates unknown.
domain: Bidirectional Converter System
range: double
sub property of: TwinShip Data Properties

twinship DO mode
type: DatatypeProperty
comment: Diesel Oil mode indicator. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: TwinShip Data Properties

twinship DO temperature in degrees C
type: DatatypeProperty
comment: Diesel Oil temperature input in degrees Celsius. See also twDOTemperatureRetInDegC for return temperature. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship DO vol in litre per hr
type: DatatypeProperty
comment: Diesel Oil volume input flow in litres per hour. See also twDOVolRetInLitrePerHr for return volume. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship DW power in kW
type: DatatypeProperty
comment: Dynamic Wing power in kilowatts. Value -1 indicates unknown.
domain: Dynamic Wing
range: double
sub property of: twinship power max in kW

twinship DW power reduction efficiency percentage
type: DatatypeProperty
comment: Dynamic Wing power reduction efficiency as a percentage. Value -1 indicates unknown.
domain: Dynamic Wing
range: double
sub property of: TwinShip Data Properties

twinship diesel engine power max in kW
type: DatatypeProperty
comment: Maximum diesel engine power output in kilowatts. Value -1 indicates unknown.
domain: Auxiliary Engine System
domain: Generator Set System
range: double
sub property of: twinship power max in kW

twinship diesel engine speed in rev per min
type: DatatypeProperty
comment: Diesel engine rotational speed in revolutions per minute. Value -1 indicates unknown.
domain: Auxiliary Engine System
domain: Generator Set System
range: double
sub property of: TwinShip Data Properties

twinship displacement max in MT
type: DatatypeProperty
comment: Maximum vessel displacement in metric tons. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship EM power in MWh
type: DatatypeProperty
comment: Electric motor power capacity in megawatt-hours. Value -1 indicates unknown.
domain: Electric Motor System
domain: Frequency Converter System
range: double
sub property of: twinship power max in kW

twinship EMSH speed in rev per min
type: DatatypeProperty
comment: Electric motor shaft rotational speed in revolutions per minute. Value -1 indicates unknown.
domain: Electric Motor Shaft
range: double
sub property of: twinship speed max in rev per min

twinship EMSH torque in kN
type: DatatypeProperty
comment: Electric motor shaft torque in kilonewtons. Value -1 indicates unknown.
domain: Electric Motor Shaft
range: double
sub property of: TwinShip Data Properties

twinship ESS C-rate
type: DatatypeProperty
comment: Energy Storage System C-rate (charge/discharge rate relative to capacity). Value -1 indicates unknown.
domain: Energy Storage System
range: double
sub property of: TwinShip Data Properties

twinship ESS capacity in MWh
type: DatatypeProperty
comment: Energy Storage System total capacity in megawatt-hours. Value -1 indicates unknown.
domain: Energy Storage System
range: double
sub property of: TwinShip Data Properties

twinship ESS cycle life
type: DatatypeProperty
comment: Energy Storage System rated cycle life (number of charge/discharge cycles). Value -1 indicates unknown.
domain: Energy Storage System
range: integer
sub property of: TwinShip Data Properties

twinship ESS depth of discharge percentage
type: DatatypeProperty
comment: Energy Storage System maximum depth of discharge as a percentage. Value -1 indicates unknown.
domain: Energy Storage System
range: double
sub property of: TwinShip Data Properties

twinship ESS volume in m3
type: DatatypeProperty
comment: Energy Storage System total volume in cubic metres. Value -1 indicates unknown.
domain: Energy Storage System
range: double
sub property of: TwinShip Data Properties

twinship ESS weight in kg
type: DatatypeProperty
comment: Energy Storage System total weight in kilograms. Value -1 indicates unknown.
domain: Energy Storage System
range: double
sub property of: TwinShip Data Properties

twinship electrical efficiency percentage
type: DatatypeProperty
comment: Electrical efficiency as a percentage. Value -1 indicates unknown.
domain: Generator Set System
range: double
sub property of: TwinShip Data Properties

twinship emergency DO mode
type: DatatypeProperty
comment: Emergency Diesel Oil mode flag. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: TwinShip Data Properties

twinship emergency diesel generator BLR fuel mode
type: DatatypeProperty
comment: Emergency diesel generator BLR fuel mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship BLR fuel mode

twinship emergency diesel generator DO temperature in degrees C
type: DatatypeProperty
comment: Emergency diesel generator Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship DO temperature in degrees C

twinship emergency diesel generator DO vol in litre per hr
type: DatatypeProperty
comment: Emergency diesel generator Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship DO vol in litre per hr

twinship emergency diesel generator emergency DO mode
type: DatatypeProperty
comment: Emergency diesel generator emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship emergency DO mode

twinship emergency diesel generator fuel temp in degrees C
type: DatatypeProperty
comment: Emergency diesel generator fuel temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship fuel temp in degrees C

twinship emergency diesel generator fuel vol litre per hr
type: DatatypeProperty
comment: Emergency diesel generator fuel volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship fuel vol litre per hr

twinship emergency diesel generator MGO in use
type: DatatypeProperty
comment: Indicates if emergency diesel generator is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
sub property of: twinship MGO in use

twinship emergency diesel generator MGO mass in kg per hr
type: DatatypeProperty
comment: Emergency diesel generator Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship MGO mass in kg per hr

twinship emergency diesel generator mass in kg per hr
type: DatatypeProperty
comment: Emergency diesel generator fuel mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship emergency mass in kg per hr

twinship emergency diesel generator power max in kW
type: DatatypeProperty
comment: Maximum emergency diesel generator power output in kilowatts. Value -1 indicates unknown.
sub property of: twinship power max in kW

twinship emergency diesel generator speed max in rev per min
type: DatatypeProperty
comment: Maximum emergency diesel generator speed in revolutions per minute. Value -1 indicates unknown.
sub property of: twinship speed max in rev per min

twinship emergency mass in kg per hr
type: DatatypeProperty
comment: Emergency mass flow in kg per hour. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship emergency mass return in kg per hr
type: DatatypeProperty
comment: Emergency mass return flow in kg per hour. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship FC frequency in Hz
type: DatatypeProperty
comment: Frequency converter output frequency in hertz. Value -1 indicates unknown.
domain: Electric Motor System
domain: Frequency Converter System
range: double
sub property of: TwinShip Data Properties

twinship FC voltage in volts
type: DatatypeProperty
comment: Frequency converter voltage in volts. Value -1 indicates unknown.
domain: Electric Motor System
domain: Frequency Converter System
range: double
sub property of: TwinShip Data Properties

twinship flowrate max in kg per hr
type: DatatypeProperty
comment: Maximum flow rate in kilograms per hour. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties

twinship fuel consumption rate in MT per hr
type: DatatypeProperty
description: The maximum pumping rate of the fuel being supplied by the bunker barge. Measurement is cubic meters per hour, or metric tonne per hour. (Numeric field, integer).
source: www.imo.org
comment: Fuel consumption rate in metric tons per hour. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties
alternative label: Fuel bunker pumping rate
notation: IMO0790

twinship fuel consumption total in MT
type: DatatypeProperty
description: Fuel consumed by Main Engine, measured in metric tons since last reporting.
source: www.imo.org
comment: Total fuel consumption in metric tons. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties
alternative label: Fuel consumed, by Main Engine
notation: IMO0670

twinship fuel density grav 15C kg per litre
type: DatatypeProperty
description: Density of fuel at 15 degrees Celsius, measured in metric tons per cubic meter.
source: www.imo.org
comment: Fuel density at 15 degrees Celsius in kilograms per litre. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties
alternative label: Fuel, density
notation: IMO0659

twinship fuel emission factor CH4 in g per kg of fuel
type: DatatypeProperty
comment: Methane (CH4) emission factor in grams per kilogram of fuel. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel emission factor CO2 in g per kg of fuel
type: DatatypeProperty
comment: Carbon dioxide (CO2) emission factor in grams per kilogram of fuel. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel emission factor N2O in g per kg of fuel
type: DatatypeProperty
comment: Nitrous oxide (N2O) emission factor in grams per kilogram of fuel. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel flow temperature max in degrees C
type: DatatypeProperty
comment: Maximum fuel flow temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship temperature max in degrees C

twinship fuel LHV kJ per kg
type: DatatypeProperty
comment: Fuel Lower Heating Value in kilojoules per kilogram. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel sulphur percentage
type: DatatypeProperty
comment: Fuel sulphur content as a percentage. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel temp in degrees C
type: DatatypeProperty
comment: Fuel temperature in degrees Celsius. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship fuel vol litre per hr
type: DatatypeProperty
comment: Fuel volume flow in litres per hour. Value -1 indicates unknown.
domain: Fuel
range: double
sub property of: TwinShip Data Properties

twinship GRS power in kW
type: DatatypeProperty
comment: Gate Rudder System power in kilowatts. Value -1 indicates unknown.
domain: Gate Rudder
range: double
sub property of: twinship power max in kW

twinship GRS power reduction efficiency percentage
type: DatatypeProperty
comment: Gate Rudder System power reduction efficiency as a percentage. Value -1 indicates unknown.
domain: Gate Rudder
range: double
sub property of: TwinShip Data Properties

twinship gearbox efficiency
type: DatatypeProperty
comment: Gearbox efficiency. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship gearbox ratio
type: DatatypeProperty
comment: Gearbox gear ratio as a string (e.g., '3.5:1'). Value '-1' indicates unknown.
domain: Gearbox System
range: string
sub property of: TwinShip Data Properties

twinship gearbox shaft generator
type: DatatypeProperty
comment: Indicates if gearbox has shaft generator. Values: 1 (yes), 0 (no), -1 (unknown).
domain: Gearbox System
range: integer
sub property of: TwinShip Data Properties

twinship generator frequency
type: DatatypeProperty
comment: Generator output frequency. Value -1 indicates unknown.
domain: Generator Set System
range: double
sub property of: TwinShip Data Properties

twinship generator power max in kW
type: DatatypeProperty
description: The measure of the production of a generator not used for propulsion, in kilowatt hours since last reporting.
source: www.imo.org
comment: Maximum generator power output in kilowatts. Value -1 indicates unknown.
domain: Auxiliary Engine System
domain: Generator Set System
range: double
sub property of: twinship power max in kW
alternative label: Generator production
notation: IMO0647

twinship generator speed in rev per min
type: DatatypeProperty
comment: Generator rotational speed in revolutions per minute. Value -1 indicates unknown.
domain: Auxiliary Engine System
domain: Generator Set System
range: double
sub property of: TwinShip Data Properties

twinship generator voltage in V
type: DatatypeProperty
comment: Generator output voltage in volts. Value -1 indicates unknown.
domain: Generator Set System
range: double
sub property of: TwinShip Data Properties

twinship inlet air pressure max in hPa
type: DatatypeProperty
description: The pressure of the air supplied to the main engine for combustion or other purposes, measured at the designated point in the air system.
source: www.iso.org
comment: Maximum inlet air pressure in hectopascals. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship pressure max in hPa
alternative label: Main Engine Air Pressure
notation: ME_AIR_PRS

twinship inlet air temperature in degrees C
type: DatatypeProperty
description: The measure of air temperature in degrees Celsius at ship location.
source: www.imo.org
comment: Inlet air temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties
alternative label: Air temperature
notation: IMO0628

twinship inlet air temperature max in degrees C
type: DatatypeProperty
comment: Maximum inlet air temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship temperature max in degrees C

twinship LT cooling seawater 1 temperature max in degrees C
type: DatatypeProperty
comment: Maximum LT cooling seawater 1 temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship LT cooling seawater temperature max in degrees C

twinship LT cooling seawater 2 temperature max in degrees C
type: DatatypeProperty
comment: Maximum LT cooling seawater 2 temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship LT cooling seawater temperature max in degrees C

twinship LT cooling seawater temperature max in degrees C
type: DatatypeProperty
comment: Maximum low-temperature cooling seawater temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship temperature max in degrees C

twinship MGO in use
type: DatatypeProperty
comment: Indicates if Marine Gas Oil is in use. Values: 1 (yes), 0 (no), -1 (unknown).
sub property of: TwinShip Data Properties

twinship MGO mass in kg per hr
type: DatatypeProperty
comment: Marine Gas Oil mass flow in kilograms per hour. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship ME cooling water temperature in degrees C
type: DatatypeProperty
description: The temperature of the cooling water circulating through the main engine, measured at the designated point in the cooling system.
source: www.iso.org
comment: Main engine cooling water temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties
alternative label: Main Engine Cooling Water Temperature
notation: ME_CW_TEMP

twinship ME cooling water temperature max in degrees C
type: DatatypeProperty
comment: Maximum main engine cooling water temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship temperature max in degrees C

twinship OSP power in KWh
type: DatatypeProperty
comment: On Shore Power capacity in kilowatt-hours. Value -1 indicates unknown.
domain: On Shore Power
range: double
sub property of: twinship power max in kW

twinship OSP time in hours
type: DatatypeProperty
comment: On Shore Power connection time in hours. Value -1 indicates unknown.
domain: On Shore Power
range: double
sub property of: TwinShip Data Properties

twinship power max in kW
type: DatatypeProperty
comment: Maximum power output in kilowatts. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship power propulsion total in kW
type: DatatypeProperty
comment: Total propulsion power in kilowatts. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties

twinship pressure max in hPa
type: DatatypeProperty
comment: Maximum pressure in hectopascals. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship propeller blades
type: DatatypeProperty
comment: Number of propeller blades. Value -1 indicates unknown.
domain: Propeller System
range: integer
sub property of: TwinShip Data Properties

twinship propeller diameter mm
type: DatatypeProperty
comment: Propeller diameter in millimetres. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller efficiency
type: DatatypeProperty
comment: Propeller efficiency (0-1 ratio). Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller expanded area ratio percentage
type: DatatypeProperty
comment: Propeller expanded area ratio as a percentage. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller hub ratio
type: DatatypeProperty
comment: Propeller hub diameter ratio (hub diameter / propeller diameter). Typical values around 0.16-0.20. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller pitch diameter ratio
type: DatatypeProperty
comment: Propeller pitch to diameter ratio. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller pitch max in percentage
type: DatatypeProperty
comment: Maximum propeller pitch as a percentage of design pitch. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship propeller skew angle degree
type: DatatypeProperty
comment: Propeller skew angle in degrees. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship rudder angle degree
type: DatatypeProperty
comment: Rudder angle in degrees. Value -1 indicates unknown.
domain: Propeller System
range: double
sub property of: TwinShip Data Properties

twinship SCR catalyst volume in m3
type: DatatypeProperty
comment: SCR catalyst volume in cubic metres. Value -1 indicates unknown.
domain: Selective Catalytic Reduction
range: double
sub property of: TwinShip Data Properties

twinship SCR exhaust gas flowrate in kg per hr
type: DatatypeProperty
comment: SCR exhaust gas flowrate in kilograms per hour. Value -1 indicates unknown.
domain: Selective Catalytic Reduction
range: double
sub property of: TwinShip Data Properties

twinship SCR NO reduction efficiency
type: DatatypeProperty
comment: SCR NOx reduction efficiency. Value -1 indicates unknown.
domain: Selective Catalytic Reduction
range: double
sub property of: TwinShip Data Properties

twinship SCR op temp centigrade
type: DatatypeProperty
comment: SCR operating temperature in degrees centigrade. Value -1 indicates unknown.
domain: Selective Catalytic Reduction
range: double
sub property of: TwinShip Data Properties

twinship scavenger air rec temperature in degrees C
type: DatatypeProperty
description: The temperature of the scavenger air in the air receiver of the main engine, measured at the designated point in the scavenger air system.
source: www.iso.org
comment: Acavenger air receiver temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: TwinShip Data Properties
alternative label: Main Engine Scavenger Air Receiver Temperature
notation: ME_SCAV_AIR_TEMP

twinship scavenger air rec temperature max in degrees C
type: DatatypeProperty
comment: Maximum scavenger air receiver temperature in degrees Celsius. Value -1 indicates unknown.
domain: Main Engine System
range: double
sub property of: twinship temperature max in degrees C

twinship shaft generator BLR fuel mode
type: DatatypeProperty
comment: Shaft generator BLR fuel mode. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Shaft Generator System
range: integer
sub property of: twinship BLR fuel mode

twinship shaft generator DO temperature in degrees C
type: DatatypeProperty
comment: Shaft generator Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship DO temperature in degrees C

twinship shaft generator DO vol in litre per hr
type: DatatypeProperty
comment: Shaft generator Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship DO vol in litre per hr

twinship shaft generator emergency DO mode
type: DatatypeProperty
comment: Shaft generator emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
domain: Shaft Generator System
range: integer
sub property of: twinship emergency DO mode

twinship shaft generator fuel temp in degrees C
type: DatatypeProperty
description: The temperature of the fuel bunkers in the bunker tanker / supplying barge. Measured in degree Celsius. (Numeric value with two decimals).
source: www.imo.org
comment: Shaft generator fuel temperature in degrees Celsius. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship fuel temp in degrees C
alternative label: Fuel bunker temperature
notation: IMO0788

twinship shaft generator fuel vol litre per hr
type: DatatypeProperty
comment: Shaft generator fuel volume flow in litres per hour. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship fuel vol litre per hr

twinship shaft generator MGO in use
type: DatatypeProperty
comment: Indicates if shaft generator is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
domain: Shaft Generator System
range: integer
sub property of: twinship MGO in use

twinship shaft generator MGO mass in kg per hr
type: DatatypeProperty
comment: Shaft generator Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship MGO mass in kg per hr

twinship shaft generator mass in kg per hr
type: DatatypeProperty
comment: Shaft generator fuel mass flow in kg per hour. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship emergency mass in kg per hr

twinship shaft generator power max in kW
type: DatatypeProperty
comment: Maximum shaft generator power output in kilowatts. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship power max in kW

twinship shaft generator speed max in rev per min
type: DatatypeProperty
comment: Maximum shaft generator speed in revolutions per minute. Value -1 indicates unknown.
domain: Shaft Generator System
range: double
sub property of: twinship speed max in rev per min

twinship shaft power max in kW
type: DatatypeProperty
description: The actual power delivered by the main engine to the propulsion shaft, measured at the output flange of the engine.
source: www.iso.org
comment: Maximum shaft power in kilowatts. Value -1 indicates unknown.
domain: Generator Set System
domain: Main Engine System
range: double
sub property of: twinship power max in kW
alternative label: Main Engine Shaft Power
notation: ME_SHFT_PWR

twinship shaft speed max in rev per min
type: DatatypeProperty
description: The average of each propeller(s) speed measured in Revolutions Per Minute (RPM).
source: www.imo.org
comment: Maximum shaft rotational speed in revolutions per minute. Value -1 indicates unknown.
domain: Generator Set System
domain: Main Engine System
range: double
sub property of: twinship speed max in rev per min
alternative label: Speed propeller
notation: IMO0617

twinship shaft torque max in kNm
type: DatatypeProperty
description: The torque transmitted by the main engine to the propulsion shaft, measured at the output flange of the engine.
source: <https://www.iso.org/>
comment: Maximum shaft torque in kilonewton-metres. Value -1 indicates unknown.
domain: Generator Set System
domain: Main Engine System
range: double
sub property of: twinship torque max in kNm
alternative label: Main Engine Shaft Torque
notation: ME_SHFT_TOR

twinship speed max in rev per min
type: DatatypeProperty
comment: Maximum rotational speed in revolutions per minute. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship stern thruster BLR fuel mode
type: DatatypeProperty
comment: Stern thruster BLR fuel mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship BLR fuel mode

twinship stern thruster DO temperature in degrees C
type: DatatypeProperty
comment: Stern thruster Diesel Oil input temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship DO temperature in degrees C

twinship stern thruster DO vol in litre per hr
type: DatatypeProperty
comment: Stern thruster Diesel Oil volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship DO vol in litre per hr

twinship stern thruster emergency DO mode
type: DatatypeProperty
comment: Stern thruster emergency Diesel Oil mode. Values: 1 (active), 0 (inactive), -1 (unknown).
sub property of: twinship emergency DO mode

twinship stern thruster fuel temp in degrees C
type: DatatypeProperty
comment: Stern thruster fuel temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: twinship fuel temp in degrees C

twinship stern thruster fuel vol litre per hr
type: DatatypeProperty
comment: Stern thruster fuel volume flow in litres per hour. Value -1 indicates unknown.
sub property of: twinship fuel vol litre per hr

twinship stern thruster MGO in use
type: DatatypeProperty
comment: Indicates if stern thruster is using Marine Gas Oil. Values: 1 (yes), 0 (no), -1 (unknown).
sub property of: twinship MGO in use

twinship stern thruster MGO mass in kg per hr
type: DatatypeProperty
comment: Stern thruster Marine Gas Oil mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship MGO mass in kg per hr

twinship stern thruster mass in kg per hr
type: DatatypeProperty
comment: Stern thruster fuel mass flow in kg per hour. Value -1 indicates unknown.
sub property of: twinship emergency mass in kg per hr

twinship stern thruster power max in kW
type: DatatypeProperty
comment: Maximum stern thruster power output in kilowatts. Value -1 indicates unknown.
sub property of: twinship power max in kW

twinship stern thruster speed max in rev per min
type: DatatypeProperty
comment: Maximum stern thruster motor speed in revolutions per minute. Value -1 indicates unknown.
sub property of: twinship speed max in rev per min

twinship temperature max in degrees C
type: DatatypeProperty
comment: Maximum temperature in degrees Celsius. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship torque max in kNm
type: DatatypeProperty
comment: Maximum torque in kilonewton-metres. Value -1 indicates unknown.
sub property of: TwinShip Data Properties

twinship vessel depth of water max in m
type: DatatypeProperty
comment: Maximum depth of water under the vessel in metres. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship vessel draft aft max in m
type: DatatypeProperty
comment: Maximum vessel draft at the aft in metres. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship vessel draft for max in m
type: DatatypeProperty
comment: Maximum vessel draft at the fore in metres. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship vessel draft mid port max in m
type: DatatypeProperty
comment: Maximum vessel draft at midship port side in metres. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship vessel draft mid stbd max in m
type: DatatypeProperty
comment: Maximum vessel draft at midship starboard side in metres. Value -1 indicates unknown.
domain: Vessel System
range: double
sub property of: TwinShip Data Properties

twinship WASP power in kW
type: DatatypeProperty
comment: Wind Assisted Propulsion System power in kilowatts. Value -1 indicates unknown.
domain: Wind Assisted Propulsion System
range: double
sub property of: twinship power max in kW

twinship WASP power reduction efficiency percentage
type: DatatypeProperty
comment: Wind Assisted Propulsion System power reduction efficiency as a percentage. Value -1 indicates unknown.
domain: Wind Assisted Propulsion System
range: double
sub property of: TwinShip Data Properties

twinship object properties
type: ObjectProperty
comment: Parent property for all TwinShip-specific object properties.

TwinShip Core Ontology (Complete)
type: Ontology
description: Complete TwinShip ontology for digital twins of ships. This is an aggregate ontology that imports the base foundation (twinship-base) plus all domain modules. Use this ontology to get the complete TwinShip conceptual model including vessels and weather. For modular development, import twinship-base and specific modules instead. ## Modeling Approach - Restriction-Based Design The TwinShip ontology follows a restriction-based modeling approach using OWL class restrictions (owl:Restriction with owl:someValuesFrom, etc.) rather than simple rdfs:domain and rdfs:range assertions. This is the recommended OWL engineering practice as it provides: - **Precise Semantics**: Restrictions state that instances of a class CAN have certain properties, without forcing classification - **Avoids Unintended Inferences**: Using rdfs:domain would cause any entity using a property to be automatically classified as a member of the domain class - **Flexible Modeling**: Multiple classes can use the same property with different constraints - **OWL Best Practice**: Aligns with OWL 2 design patterns and enables proper use of reasoners ## Visualization and Documentation Most ontology visualization and documentation tools (WIDOCO, WebVOWL) were designed for RDFS-style ontologies and provide limited support for OWL restriction patterns. They expect simple rdfs:domain and rdfs:range assertions to generate diagrams. To address this limitation while maintaining correct OWL semantics, we maintain two versions: 1. **Source Version** (in model/ folder): Uses proper OWL restrictions - this is the authoritative version for reasoning and semantic operations 2. **Visualization Version** (auto-generated): A simplified version with explicit rdfs:domain/rdfs:range assertions extracted from restrictions, used solely for documentation generation Both versions are kept synchronized through automated scripts.
title: TwinShip Ontology
created on: 2025-01-21T00:00:00+00:00
last updated on: 2026-03-03T00:00:00+00:00
version: 0.0.4
comment: Complete TwinShip ontology for digital twins of ships. This is an aggregate ontology that imports the base foundation (twinship-base) plus all domain modules. Use this ontology to get the complete TwinShip conceptual model including vessels and weather. For modular development, import twinship-base and specific modules instead. Modeling Approach Note: The TwinShip ontology follows a restriction-based modeling approach using OWL class restrictions rather than simple rdfs:domain and rdfs:range assertions. This is the recommended OWL engineering practice as it provides precise semantics and avoids unintended inferences that would occur with rdfs:domain (where any entity using a property would automatically be classified as a member of the domain class). Since most documentation and visualization tools (WIDOCO, WebVOWL) provide limited support for rendering OWL restrictions, we maintain two versions: 1. Source Ontology (This File): Uses proper OWL restrictions - this is the authoritative version for reasoning and semantic operations. 2. Visualization Version (Auto-Generated): A simplified version with explicit rdfs:domain/rdfs:range assertions extracted from restrictions, used solely for generating documentation and diagrams. Both versions are kept synchronized through automated scripts. See twinship-base for detailed explanation of this modeling practice.
version IRI: https://twin-ship.eu/twinship/core/0.0.4