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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.