
The vessel moves.
The position shouldn’t.
Accurate environmental and motion sensing for reliable dynamic positioning.
When the vessel has to stay put, the measurements cannot drift
A dynamic positioning system continuously calculates the forces acting on a vessel and adjusts its thrusters and propellers to maintain position and heading. Wind, current and waves are constantly changing the conditions, so the system needs dependable information to respond appropriately.
That makes the sensors part of the DP architecture, rather than simply instruments attached to it. Environmental measurements need to arrive quickly and accurately, while feedback from propulsion, steering and other vessel systems needs to remain dependable throughout operation.
For operators and system designers, the question is therefore broader than whether a sensor can produce a reading. It is whether that measurement can be trusted, integrated and maintained as part of a critical vessel system.
What the DP system needs to know
A DP system combines information from several sources to understand both the vessel and the forces acting upon it.
Wind speed and direction provide an environmental reference. Position and rotary sensing can provide feedback from propulsion and steering systems, while level sensing supports monitoring of fuel, ballast and other vessel systems. Each measurement has a different role, but together they contribute to the information used to maintain position and heading.
That creates requirements beyond measurement accuracy alone. Response time, environmental protection, communications, physical installation and measurement confidence all have to work within the wider vessel architecture.
Gill provides sensing technologies across these requirements, from ultrasonic wind measurement to non-contact position and level sensing. Where calibration is required, Labcal provides UKAS-accredited calibration services for the wider measurement ecosystem.
Where a DP system gets its environmental picture
A dynamic positioning system holds a vessel on station by balancing the forces acting on it. Wind is the one it can measure directly. Select a point to see what is measured there and which sensors are specified.
Swipe the drawing sideways to see the whole scene
The primary wind reference
The control loop resolves wind force from speed and direction, so the primary head goes where airflow is least disturbed. No bearings to seize, on a mast nobody can reach.
- WindObserver 75 heated, 0 to 75 m/s
- WindObserver 90 where extreme gusts are credible
A second reference, deliberately elsewhere
Two sensors are only redundant if they fail independently. The second head often has to go on a light bracket, where weight decides it as much as range does.
- WindUltra 270 g, heated as standard
- WindObserver 70 marine type approved, heated
Pressure, temperature and humidity
Air density changes the force a given wind speed exerts. One enclosure adds pressure, temperature and humidity, with GPS and compass options to keep direction true.
- MaxiMet Marine GMX560 wind, pressure, temp, humidity
- MaxiMet Marine GMX260 wind only
Proving the thruster went where it was told
A DP system commands thrust and angle, then needs to know what happened. Non-contact rotary sensing reports azimuth with no linkage to wear.
- Blade360 position sensor 360 degrees, IP67, sealed for temporary immersion (1 m for 30 min)
Rudder and steering gear feedback
Where rudders hold station alongside thrusters, the same non-contact sensing reports angle. Nothing wears, so the feedback does not change with mechanical wear between dockings.
- Blade25 or Blade60 linear position sensor 25 mm or 60 mm travel
Fuel and ballast while the vessel works
Long DP operations burn fuel and shift ballast, which changes trim and the wind force on the hull. Capacitive sensing has no float to stick.
- LevelPro stainless, shipboard tanks
Wear in the drives holding the vessel there
A thruster drive that fails during close-proximity work is a safety problem. Ferrous debris in the oil shows wear developing between overhauls.
- WearDetect debris, water, oil temperature
Evidence the wind input can be trusted
A DP system is only as good as the measurement feeding it, and an incident review will ask for evidence. Accredited calibration gives a traceable certificate.
- UKAS-accredited air velocity calibration traceable
- Recalibration scheduling intervals and turnaround
Wind data the control system can act on
Wind speed and direction provide the DP system with information about one of the external forces acting on the vessel. Accurate, responsive measurement allows changing conditions to be reflected in the control system as they occur.
Gill ultrasonic wind sensors provide wind speed and direction without moving parts, with marine configurations designed for exposed environments and demanding continuous-operation applications.
Low-latency ultrasonic measurement
Explore wind sensorsFeedback from the machinery keeping the vessel on station
Environmental conditions are only part of the picture. Position, rotary and level measurements can support the wider vessel systems responsible for propulsion, steering, fuel, fluids and equipment monitoring.
Gill’s industrial sensing technologies include non-contact position measurement and solid-state liquid level sensing, providing measurement without relying on mechanical contact at the sensing point.
Non-contact sensing. No mechanical wear at the measurement point.
Explore industrial sensingKeep the wider measurement ecosystem in check
Calibration matters when measurement performance needs to be verified against a traceable reference, particularly across complex vessel systems containing equipment from multiple manufacturers.
Labcal provides UKAS-accredited calibration services for a wide range of measurement equipment, giving Gill customers access to an independent calibration capability that can support the broader measurement ecosystem around their vessel, rather than limiting the service to Gill-manufactured instruments.
Gill supplies the sensing technologies. Labcal provides calibration expertise that can help customers maintain traceability across the wider set of instruments their operation relies on.
UKAS-accredited calibration through Labcal
Explore LabcalMeasurement only matters when the system can use it
DP systems depend on information reaching the control architecture in the required format and at the required rate.
Gill sensors support established interfaces and communications requirements across environmental and industrial sensing applications, with engineering support available where an application calls for a more specific integration approach.
For critical systems, one measurement is rarely the whole answer
DP vessels are designed around redundancy because a single failure should not compromise the ability to maintain position. That principle extends into the measurement architecture.
Multiple sensors and independent measurement sources can provide the control system with additional information and allow discrepancies to be identified rather than silently accepted. The exact architecture depends on vessel class, DP notation, system design and operational requirements.
Gill’s role is to provide measurement technologies that can form part of that wider architecture, with products selected according to the environmental conditions, required performance and integration requirements of the application.
More than wind measurement
Dynamic positioning creates a broader sensing requirement than the anemometer alone.
Gill’s ultrasonic wind sensors provide environmental measurement, while the wider sensing range extends into liquid level, position and condition monitoring. This allows different parts of the vessel’s measurement architecture to be considered together rather than sourcing every requirement through a different technology provider.
Wind measurement
Ultrasonic wind sensors for measuring wind speed and direction, including marine configurations designed for demanding environments and continuous operation.
Explore wind sensorsLiquid level
Solid-state capacitive level sensing for fuel, water, oil and other vessel fluids, including applications where mechanical floats or moving components are undesirable.
Explore level sensorsPosition
Non-contact linear and rotary position sensing for machinery and control applications where repeatable position feedback is required without mechanical contact at the sensing point.
Explore position sensorsCondition monitoring
WearDetect oil debris sensing provides a way to identify metallic wear particles in lubricating oil, helping operators understand developing machinery condition rather than relying solely on fixed maintenance intervals.
Explore WearDetectThe sensor has to survive the vessel as well as measure it
Marine installations bring together salt, moisture, vibration, movement, temperature changes and restricted access. Depending on where a sensor is installed, there may also be significant consequences associated with losing measurement availability.
Gill’s marine sensing products are designed for demanding vessel and offshore environments, with relevant products offering environmental protection, marine approvals and construction appropriate to their intended application.
Specification therefore starts with more than the measurement itself. The installation environment, required approvals, physical mounting and lifecycle expectations all need to be considered.
Confidence in the measurement does not end at commissioning
For critical sensing applications, knowing how a measurement performed when the equipment left the factory is only part of the picture. Verification throughout the operating life of the equipment provides a way to identify changes in measurement performance and maintain traceability where required.
Through Labcal, Gill customers have access to UKAS-accredited calibration capability covering a broad range of measurement technologies. This provides a useful wider service ecosystem for vessels carrying multiple types of measurement equipment.
Where position, propulsion and environmental forces have to work together
Dynamic positioning is used across marine operations where maintaining a defined position or heading is critical to the task.
Offshore construction
Vessels carrying out construction, installation and subsea operations may need to maintain position precisely while working around fixed infrastructure or sensitive equipment.
Subsea operations
ROV support, inspection and intervention work can require controlled vessel positioning while environmental conditions and operational loads change.
Drilling and offshore production
DP can provide station keeping for vessels operating around offshore assets where maintaining position is fundamental to safe and effective operations.
Cable and pipeline installation
Installation operations require controlled vessel movement and positioning while equipment is deployed along a defined route.
Survey and research
Survey vessels and research platforms can require stable, repeatable positioning to support measurement, mapping and subsea operations.
Diving support
Diving operations depend on controlled vessel position and heading while personnel and equipment operate in the water.
A complete measurement picture, from environment to machinery
Wind speed and direction
Information about the external forces acting on the vessel.
Position, rotary and level
Feedback from propulsion, steering and supporting vessel systems.
Interfaces, communications and embedded engineering
Measurement data delivered to the systems responsible for monitoring and control.
Calibration and verification
A traceable basis for maintaining confidence in critical measurements throughout the equipment lifecycle.
The objective is not simply to measure more. It is to give the control system dependable information about the vessel and the environment around it.
One vessel. More than one sensing requirement.
Gill brings together environmental and industrial sensing technologies under one engineering organisation, allowing marine system designers to address different measurement requirements without treating each sensor as an isolated component.
The relationship can begin with a wind measurement requirement and extend into position, level, condition monitoring, calibration or bespoke engineering as the vessel architecture demands it.
That breadth matters when the objective is not simply to specify a sensor, but to build a measurement system that remains dependable throughout the operational life of the vessel.
The information you need to specify with confidence
Find product datasheets, manuals, technical documentation, calibration information and integration resources for the sensing technologies used across dynamic positioning applications.
Questions about sensing for dynamic positioning
Dynamic positioning (DP) is a vessel control system that automatically maintains position and heading using thrusters and propellers. It continuously combines information from position, heading, environmental and vessel systems to determine the required response as wind, waves, current and other forces change.
A DP system can use several sources of measurement, including wind sensors, position and motion reference systems, gyrocompasses and feedback from propulsion and steering systems. The exact sensor architecture depends on the vessel, DP class, operational requirements and system design. Gill provides ultrasonic wind sensors alongside industrial sensing technologies for position, level and condition monitoring.
Wind creates an external force on a vessel that the DP system needs to account for when maintaining position and heading. Accurate wind speed and direction provide information about changing environmental conditions, allowing the control system to respond appropriately. Gill ultrasonic wind sensors provide continuous wind measurement without mechanical wind-sensing components.
A wind sensor used in DP should be assessed for accuracy, response time, environmental protection, communications, power requirements, marine suitability and the redundancy requirements of the wider system. Gill provides ultrasonic wind sensors designed for demanding marine and offshore applications.
DP systems are designed around redundancy, with the specific requirements depending on the vessel, DP class, notation and system architecture. Independent measurement sources can help maintain system availability and allow discrepancies to be identified. Sensor selection should therefore be considered as part of the wider DP architecture rather than in isolation.
The required wind measurement accuracy depends on the DP system, vessel and operating conditions. Accuracy should be considered alongside response time, output rate, environmental performance, installation and redundancy requirements rather than treated as a single specification in isolation. Gill can help assess wind-sensor selection against the requirements of the application.
Response requirements depend on the vessel, control architecture and operating conditions. A DP system needs environmental information quickly enough to account for changing forces acting on the vessel. Gill ultrasonic wind sensors provide rapid wind measurement and output configurations suitable for demanding marine applications.
Yes. Wind sensors are widely used as part of the environmental measurement architecture on vessels operating offshore and with dynamic positioning systems. Gill provides marine ultrasonic wind sensors designed for exposed environments and continuous operation.
The wider vessel measurement architecture can include position, rotary, level and machinery-condition sensing alongside environmental wind measurement. Gill provides non-contact position sensing, solid-state liquid level sensing and WearDetect oil-debris monitoring alongside its ultrasonic wind sensors.
Sensors should be specified according to the measurement required, accuracy, response time, environmental conditions, power requirements, communications, approvals and redundancy architecture. Gill recommends considering each sensor as part of the wider measurement chain and control architecture rather than specifying the measurement in isolation.
Integration depends on the DP architecture and the interfaces supported by the selected sensor and control system. Gill wind sensors provide established outputs including NMEA 0183 and serial communications, allowing measurement data to be incorporated into wider marine monitoring and control systems.
Marine sensors may be exposed to salt, moisture, spray, vibration, movement, temperature changes and high winds, while access for maintenance can be limited. Sensor selection should therefore consider environmental protection, materials, operating temperature, approvals and the consequences of losing measurement availability. Gill offers marine sensing technologies designed for demanding vessel and offshore environments.
Calibration provides a traceable way to assess measurement performance against an appropriate reference. Where measurement confidence and traceability are important, calibration can form part of the wider lifecycle management of the vessel’s instrumentation. Labcal provides UKAS-accredited calibration services for a wide range of measurement equipment, supporting the broader measurement ecosystem around marine and industrial systems.
Yes. Gill’s sensing range extends beyond ultrasonic wind measurement to include liquid level, linear and rotary position and oil-condition monitoring. This allows different measurement requirements within a vessel or marine system to be addressed through technologies from the same Gill organisation.
Gill provides engineering support across environmental and industrial sensing applications. Where a requirement does not fit a standard product configuration, the application can be assessed around its measurement requirements, environmental conditions, integration needs and wider system architecture.
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