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Vessel Reference System, VRS

• What is it?

• Why have it?

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VRS Components

• Motion Reference Unit (IMU), MRU.

• Integrated IMU/GPS, Seapath 200.

• Helideck Monitoring System, HMS 100.

• DGPS Positioning System, Seatex DPS.

• Dynamic and Relative Positioning System, Seatex DARPS.

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Inertial Measurement Unit,IMU at center of System

• To determine your exact HPR Transducer Location orGPS Antenna Locations.

• To aid your multibeam or sonar equipment.

• Heave compensation of Offshore Cranes.

• Seapath 200 Integrated IMU/GPS.

• HMS-100 Motion of Helideck.

• Motion Reference Unit, Seatex MRU.

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Integrated GPS/Inertial Technology

• Heading Aiding during Offshore Loading.

• Integrated Inertial/GPS system providing Position updatesat 100 Hz.

• High Accuracy Gyro Calibration.

• Heading, Roll, & Pitch Accuracy of 0.05 degrees.

• Seatex Seapath 200.

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Precise Positioning

• DPS - DGPS Positioning System.

− Robust, Reliable and Accurate Position.

− Multiple DGPS Reference Stations.

− IALA radio beacons, INMARSAT, FM radio, or any local orwide area reference station meeting the RTCM SC-104standard.

− Software tuned to handle dynamics of any vessel in heavyseas or low satellite coverage.

• Seatex DPS.

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Precise Absolute andRelative Positioning

• DARPS - Dynamic and Relative Positioning System.

• Uses Seatex DPS for multiple Reference Stations.

− IALA radio beacons, INMARSAT, FM radio, or.

− any local or wide area reference station meeting the.

− RTCM SC-104 standard.

• Seatex DARPS.

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Helideck Monitoring System

• Utilizes Attitude measurements from the MRU to increasehelicopter safety during landing operations on movinghelidecks.

• Calculates and Energy Index value according to WindDirection and Speed, Temperature, and BarometricPressure.

• Index value dependent on Ship and Helicoptercharacteristics.

• Seatex HMS-100.

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Add-ons or Upgrade Options

• Individual Components Easy to Integrate.

• Cost Benefit.

• Upgrade.

• Or Install All Components Initially.

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North Sea Customers

• STATOIL FLEET - Oil Loading

• PGS - Seismic

• Supply Vessels

• FPSOs

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Conclusion

• The Vessel Reference System is a modular method ofintegrating your positioning, velocity, and motionmeasurements.

• This is easily completed by using some of the Seatexproducts: MRU, Seapath 200, DPS, DARPS, and theHMS-100.

• These can be integrated at first installation or upgradedpiece by piece.

Seatex Internal Presentation Theme by: Michael Ingram: Seatex

Dynamic Positioning Conference: Marine Technology Society

October 21 - 22, 1997

Session 8: Positon, Environment and Attitude Sensors

Seatex Internal Presentation Theme

• This talk to focus on:– Ability to add-on many systems

• ease of integration

• System as whole or piece by piece

– Cost

– Accuracy

– Reliability

• Have a master system slide where “blank” slidesare overlayed with the VRS components. Easy toput on an take off.

Vessel Reference System, VRS

• What is it?

• Why have it?

VRS Components

• Motion Reference Unit (IMU), MRU• Integrated IMU/GPS, Seapath 200

• Helideck Monitoring System, HMS 100

• DGPS Positioning System, Seatex DPS• Dynamic and Relative Positioning System,

Seatex DARPS

Inertial Measurement Unit, IMUat center of System

• To determine your exact HPR TransducerLocation, GPS Antenna Locations.

• To aid your multibeam or sonar equipment.

• Heave compensation of Offshore Cranes.

• Seapath 200 Integrated IMU/GPS

• HMS-100 Motion of Helideck

• Motion Reference Unit, Seatex MRU

Integrated GPS/InertialTechnology

• Heading Aiding during Offshore Loading.

• Integrated Inertial/GPS system providingPosition updates at 100 Hz.

• High Accuracy Gyro Calibration.

• Heading, Roll, & Pitch Accuracy of 0.05degrees.

• Seatex Seapath 200

Precise Positioning

• DPS - DGPS Positioning System– Robust, Reliable and Accurate Position

– Multiple DGPS Reference Stations

– IALA radio beacons, INMARSAT, FM radio,or any local or wide area reference stationmeeting the RTCM SC-104 standard.

– Software tuned to handle dynamics of anyvessel in heavy seas or low satellite coverage

• Seatex DPS

Precise Absolute and RelativePositioning

•DARPS - Dynamic and Relative PositioningSystem

•Uses Seatex DPS for multiple ReferenceStations

–IALA radio beacons, INMARSAT, FM radio, or

any local or wide area reference station meeting the

RTCM SC-104 standard.

•Seatex DARPS

Helideck Monitoring System

• Utilizes Attitude measurements from theMRU to increase helicopter safety duringlanding operations on moving helidecks.

• Calculates and Energy Index valueaccording to Wind Direction and Speed,Temperature, and Barometric Pressure.

• Index value dependent on Ship andHelicopter characteristics.

• Seatex HMS-100

Add-ons or Upgrade Options

• Individual Components Easy to Integrate.

• Cost Benefit

• Upgrade

• Or Install All Components Initially

North Sea Dominance

• Haakon to put something in here.

Overall Picture

This slide to have a picture of a vessel with a helipad, DP, and/or mulitbeam and possiblyoffloading oil. It should have a need for all the components of the VRS.