GPS/GNSS Receiver
medium
20 models total
A marine GNSS receiver differs from a consumer unit mainly in redundancy and integrity monitoring: SOLAS vessels carry at least two independent receivers, often tracking GPS, GLONASS and Galileo simultaneously, feeding position directly into ECDIS, AIS and the autopilot.
Read more — GPS/GNSS Receiver explained ▾
What sets a GNSS receiver apart
A GNSS receiver only fixes position; it tells the bridge nothing about heading. That job belongs to the gyrocompass and magnetic compass sitting alongside it in this category. Unlike a handheld consumer unit, a SOLAS-fitted receiver tracks several satellite constellations at once - GPS, GLONASS, Galileo, BeiDou - and applies satellite-based augmentation (SBAS, e.g. EGNOS or WAAS) or differential corrections to bring horizontal accuracy from the 5-10 m of standalone GPS down to 1-3 m. Two independent receivers, wired to separate antennas and power feeds, are standard on SOLAS vessels so a single antenna cable fault or jamming event does not blind the ship.
Main components
Antenna
An active antenna with a built-in low-noise amplifier, mounted with clear sky view away from radar scanners and funnel exhaust. Cable length and quality matter: a long, degraded coax run is the most common cause of intermittent fix loss.
Receiver/processor unit
Tracks the visible satellites on multiple channels (typically 20-70+ channels across constellations), computes position, course over ground, speed over ground and UTC time, and runs receiver autonomous integrity monitoring (RAIM) to flag an unreliable fix.
Output interfaces
Feeds position and time to ECDIS, AIS, VDR, autopilot and the alarm system over NMEA 0183 or NMEA 2000 (IEC 61162 series). Loss of this output silently degrades several other systems at once, which is why the receiver sits on an uninterruptible supply.
Backup power
A small UPS or battery buffer keeps the receiver's clock and almanac alive through a brief mains interruption, avoiding the several-minute cold-start delay needed to reacquire a full satellite almanac from nothing.
Selection criteria
| Criterion | Why it matters |
|---|---|
| Constellations tracked | More constellations mean more satellites in view and faster recovery after signal loss in port or under superstructure shadow |
| Augmentation support | SBAS or DGNSS input tightens accuracy for pilotage and dynamic positioning work |
| Update rate | 1 Hz is enough for passage navigation; DP and survey work want 5-10 Hz |
| Interface protocol | Must match the ship's existing NMEA 0183 or 2000 bus and IEC 61162 wiring |
| Type approval | Wheelmark certification confirms compliance with IMO performance standards |
Regulations and class
SOLAS Chapter V, Regulation 19 lists a GNSS receiver among the mandatory navigation equipment for ships on international voyages, sized by gross tonnage. IMO resolution A.915(22) and the receiver standard IEC 61108-1 set the performance requirements a type-approved unit must meet. Class societies check the fitted receiver during annual and renewal surveys of navigation equipment, mainly confirming it is operational, correctly interfaced and carries a valid wheelmark; there is no separate periodic calibration for the receiver itself since it self-corrects against the satellite signal.
Typical faults
- Degraded antenna cable - corroded connector or chafed coax causes intermittent signal loss, often blamed on the receiver when the fault is really upstream.
- Jamming or spoofing - increasingly reported in conflict areas and some straits; the receiver may report a confident but wrong position rather than losing the fix outright.
- Flat backup battery - a dead buffer battery forces a cold start after every power interruption, delaying the fix by several minutes at the worst possible time.
- Multipath near quay walls - reflected signals off steel structures in port cause position jitter that can trip autopilot or DP alarms.
- Firmware/almanac mismatch after long lay-up - an old almanac slows first fix acquisition until the receiver downloads current ephemeris data.
What to look for in a supplier
- Current wheelmark/type approval certificate matching the installed software version, not just the model line
- Genuine multi-constellation tracking rather than GPS-only with constellation names added to the spec sheet
- Documented compatibility with the ship's existing NMEA bus and alarm system wiring
- Antenna and cable kits available as matched spares, not just the receiver unit
- Clear guidance on jamming/spoofing detection features, if fitted, and how alarms are presented to the bridge team
Keep a log of position jumps and RAIM alarms as they happen - a spoofed fix looks entirely plausible to the autopilot, and the only way to catch it is by comparing it against radar, visual fixes or the second independent receiver.
8 manufacturers · 20 models
JRC
6
JLR-21 MkII GPS Navigator
unverified
Gnss systems
GPS/GLONASS
Channels
24
Accuracy (m)
2.5
IMO Compliant
ja
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
JLR-31 GPS Navigator
unverified
Gnss systems
GPS/GLONASS/Galileo
Channels
72
Accuracy (m)
1.5
IMO Compliant
ja
Common Failures & Inspection Points
- Sensor, antenna or transducer fouling, damage or misalignment causes unstable, missing or inaccurate data
- Power-supply or processor faults cause resets, blank displays or complete loss of indication
- Cable, connector or network faults cause intermittent data or loss of outputs to other bridge systems
- Incorrect configuration or calibration causes persistent disagreement with independent references
- Display or software faults cause frozen values, alarms or unavailable functions
Service: Inspect sensors, antennas, transducers, cabling, power supplies, displays and data interfaces. Compare information with independent references and review alarm history. Verify distribution to dependent bridge systems. Refer to the manufacturer documentation for the exact figure for calibration, alignment and performance criteria.
Spare Parts: Carry fuses, interface cables, approved power supplies, sensor or antenna parts and supported display or processor modules.
Use Cases: Navigation, pilotage, collision avoidance and bridge-system integration.
JLR-7800 DGPS Receiver
unverified
Gnss systems
GPS/DGPS
Channels
12
Accuracy (m)
1
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
JLR-7900 DGPS Receiver
unverified
Gnss systems
GPS/GLONASS/DGPS
Channels
72
Accuracy (m)
0.5
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
JHS-32A GPS Compass
unverified
Gnss systems
GPS/GLONASS
Channels
36
Heading accuracy deg
0.5
IMO Compliant
ja
Common Failures & Inspection Points
- Sensor or antenna fault caused by fouling, damage, wear or water ingress, resulting in loss, weak response or degraded navigation data
- Power-supply failure caused by breaker, converter or wiring problems, resulting in loss of indication
- Processor or display fault caused by electronics or software problems, resulting in frozen, blank or erroneous output
- Interface or network failure caused by cabling or configuration faults, resulting in missing data at connected bridge equipment
- Calibration, alignment or configuration error caused by incorrect setup or maintenance, resulting in persistent disagreement with independent navigation references
Service: Compare the indicated value with independent references and investigate persistent disagreement rather than applying unrecorded corrections. Inspect sensors, antennas, transducers, cabling, power supplies, repeaters and network interfaces applicable to the installed equipment. Verify alarms and data outputs to radar, ECDIS, autopilot and voyage-data systems where connected. Keep calibration, deviation or configuration records current as appropriate to the sensor type. Protect exposed sensors and transducers from paint, deposits and water ingress. Refer to manufacturer and bridge-equipment documentation for exact test, calibration and alignment procedures.
Spare Parts: Keep fuses, lamps or display consumables, selected power-supply and interface modules, cables or connectors and manufacturer-recommended sensor service parts. Replacement core sensors, antennas or processors must remain compatible with the approved bridge installation. Preserve calibration and configuration data when changing equipment.
Use Cases: Bridge navigation and sensor input for collision avoidance, route monitoring, steering, depth awareness and other shipboard navigation functions according to the equipment category.
NQA-4830 DGPS Receiver
unverified
Gnss systems
GPS/DGPS
Channels
12
Accuracy (m)
1
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
Furuno
4
GP-170D DGPS Navigator
unverified
Gnss systems
GPS/GLONASS/DGPS
Channels
72
Accuracy (m)
1
IMO Compliant
ja
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
GP-150D Mark-2 GPS
unverified
Gnss systems
GPS/DGPS
Channels
12
Accuracy (m)
2.5
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
GP-39 GPS/WAAS Navigator
unverified
Gnss systems
GPS/WAAS
Channels
12
Accuracy (m)
3
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
GP-33 GPS Navigator
unverified
Gnss systems
GPS
Channels
12
Accuracy (m)
3
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
Hemisphere GNSS
3
V500 GNSS Compass
unverified
Gnss systems
GPS/GLONASS/Galileo/BeiDou
Channels
372
Heading accuracy deg
0.1
Accuracy (m)
0.6
Common Failures & Inspection Points
- Sensor contamination, mechanical damage, ageing, or environmental exposure causes drifting, unstable, or missing measurements
- Power-supply, fuse, or internal electronic faults cause loss of indication, rebooting, or sensor-offline alarms
- Cable, connector, network, or interface faults produce intermittent data or loss of information at repeaters and connected systems
- Incorrect alignment, calibration, configuration, or reference input causes a consistent offset or implausible readings
- Display, repeater, processor, or software faults can cause frozen values, failed alarms, or disagreement between indications
Service: Check sensor condition and mounting, power supply, cabling, connectors, reference inputs, repeaters, interfaces, alarm history, and comparison with independent indications where practical. Calibration, alignment, and exact accuracy limits must follow manufacturer and statutory documentation.
Spare Parts: Carry approved fuses, connectors, interface modules, display or control items, sensor service parts, and model-specific power-supply components recommended by the manufacturer.
Use Cases: Used on merchant, passenger, offshore, fishing, research, and workboat vessels to support navigation, heading, speed, depth, position, or weather awareness.
VS330 GNSS Compass
unverified
Gnss systems
GPS/GLONASS/Galileo
Channels
230
Heading accuracy deg
0.1
Accuracy (m)
0.8
Common Failures & Inspection Points
- Sensor contamination, mechanical damage, ageing, or environmental exposure causes drifting, unstable, or missing measurements
- Power-supply, fuse, or internal electronic faults cause loss of indication, rebooting, or sensor-offline alarms
- Cable, connector, network, or interface faults produce intermittent data or loss of information at repeaters and connected systems
- Incorrect alignment, calibration, configuration, or reference input causes a consistent offset or implausible readings
- Display, repeater, processor, or software faults can cause frozen values, failed alarms, or disagreement between indications
Service: Check sensor condition and mounting, power supply, cabling, connectors, reference inputs, repeaters, interfaces, alarm history, and comparison with independent indications where practical. Calibration, alignment, and exact accuracy limits must follow manufacturer and statutory documentation.
Spare Parts: Carry approved fuses, connectors, interface modules, display or control items, sensor service parts, and model-specific power-supply components recommended by the manufacturer.
Use Cases: Used on merchant, passenger, offshore, fishing, research, and workboat vessels to support navigation, heading, speed, depth, position, or weather awareness.
Atlas Link GNSS
unverified
Gnss systems
GPS/GLONASS/Galileo/BeiDou
Channels
372
Accuracy (m)
0.08
Correction service
Atlas
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
Simrad
2
GN70 GPS Navigator
unverified
Gnss systems
GPS/GLONASS
Channels
72
Accuracy (m)
1.5
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
GN33 GPS Navigator
unverified
Gnss systems
GPS
Channels
12
Accuracy (m)
2.5
IMO Compliant
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
Trimble Marine
2
SPS785 Marine GNSS
unverified
Gnss systems
GPS/GLONASS/Galileo/BeiDou
Channels
440
Accuracy (m)
0.01
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
SPS361 Marine Heading
unverified
Gnss systems
GPS/GLONASS
Heading accuracy deg
0.05
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
Kongsberg Maritime
1
Seapath 130 GNSS/INS
unverified
Gnss systems
GPS/GLONASS/Galileo
Heading accuracy deg
0.02
Inertial
ja
Common Failures & Inspection Points
- Sensor drift, damage or loss of reference caused by ageing, magnetic influence, antenna issues or internal faults can produce unstable or incorrect heading or position information
- Control or interface failure caused by electronics, cabling or network faults can create steering alarms, rejected inputs or loss of automatic control
- Power-supply interruption caused by loose connections, protection trips or internal failure can result in resets or total loss of indication
- Incorrect calibration or configuration after maintenance can show as persistent offset, poor course keeping or disagreement with independent references
- Mechanical wear in connected steering components where applicable can cause slow response, hunting, leakage or increased steering error
Service: Compare indications with independent references, inspect sensors and cable routes, verify power supplies and alarms, and test changeover or backup arrangements where fitted. For heading-control equipment, examine the connected steering feedback and response as well as the bridge controller. Refer to manufacturer documentation for exact calibration and acceptance values.
Spare Parts: Useful spares include maker-approved fuses, interface modules, power-supply parts, display or control modules, connectors and sensor accessories appropriate to the installed system.
Use Cases: Merchant, passenger, offshore and specialist vessels requiring heading, position, speed or automatic steering information at the bridge.
NovAtel
1
SMART7-S Marine GNSS
unverified
Gnss systems
GPS/GLONASS/Galileo/BeiDou
Channels
555
Accuracy (m)
0.6
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.
u-blox
1
ZED-F9P Marine RTK
unverified
Gnss systems
GPS/GLONASS/Galileo/BeiDou
Channels
184
Accuracy (m)
0.01
Rtk
ja
Common Failures & Inspection Points
- Loss of electrical, hydraulic, pneumatic, or other service supply caused by a tripped protection device, leakage, blockage, or upstream fault results in failed starting or loss of function
- Mechanical wear, corrosion, fouling, or contamination of moving and wetted parts causes increased noise, leakage, sticking, vibration, or reduced performance
- Seal, gasket, hose, cable, or connection deterioration from age, heat, vibration, or environmental exposure produces visible leakage, intermittent signals, or loss of pressure
- Sensor, switch, actuator, relay, or control-system faults can cause incorrect indication, nuisance alarms, failed automatic sequences, or loss of remote control
- Incorrect adjustment, assembly, or maintenance can lead to unstable operation, recurrent alarms, or performance that differs from the vessel's normal baseline
Service: Inspect the unit for leakage, corrosion, contamination, loose connections, abnormal noise or vibration, condition of guards and mountings, service supplies, controls, alarms, and functional performance. Use the vessel maintenance history to identify deterioration trends and refer to the manufacturer documentation for exact settings, tolerances, test values, and overhaul criteria.
Spare Parts: Keep the manufacturer-recommended seals and gaskets, filters where fitted, fuses or protection items, common sensors and switches, and critical actuator, control, or wear components appropriate to the installed configuration. Exact part numbers and quantities must come from the manufacturer spare-parts documentation.
Use Cases: Used on vessel types fitted with position & heading equipment, including merchant, offshore, passenger, fishing, or workboat installations where this specific gnss receiver duty is required.