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Marine GNSS Receiver with Heading for Vessels and USVs

A marine GNSS heading receiver gives vessels centimetre RTK position and true heading that steel hulls and engines cannot disturb. Eview delivers it with the HB6 Pro, HB56H, HB50H and HB59 dual-antenna receivers and the salt-spray tested EV288 antenna, powered by Septentrio modules for USVs, survey boats and workboats.

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0.15°
Heading at 1 m baseline
0.25°
Pitch and roll (HB6 Pro)
100 Hz
Output (HB59)
<10 ms
Latency (HB59)
What vessels need

What a vessel needs from its GNSS receiver

True heading, not magnetic
A dual-antenna GNSS compass gives 0.15° heading at 1 m spacing, even when stationary, and is not affected by steel hulls, engines or cables. See how dual-antenna heading works.
Pitch and roll
The HB6 Pro adds pitch or roll at 0.25° with a 1 m baseline, useful for motion-aware hydrographic survey and for vessel control on small craft. See attitude from a moving base.
Centimetre RTK position
RTK accuracy of 0.6 cm + 0.5 ppm horizontal and 1 cm + 1 ppm vertical for hydrographic survey, docking and track keeping. See RTK positioning.
Fast, low-latency output
Autonomous vessels need fresh data. The HB59 outputs up to 100 Hz with less than 10 ms latency, and the HB6 Pro and HB56H give RTK and heading at up to 20 Hz. See 100 Hz GNSS.
Built for the marine environment
The EV288 antenna is IP67 and vibration and salt-spray tested with a 5/8-inch mount, and the HB56H has a flange-mount metal housing. See GNSS antennas.
Interference and scintillation
AIM+ suppresses RF interference from on-board radios and other electronics, and IONO+ keeps RTK working during ionospheric scintillation, common at low latitudes after sunset. See IONO+ after sunset.
Recommended products

Eview heading receivers and antennas for marine use

ProductBest forKey specs
HB6 ProUSVs and small survey boatsmosaic-H dual antenna, heading 0.15° and pitch or roll 0.25° at 1 m, 45 g, 100 Hz measurements
HB56HWorkboats and survey vesselsmosaic-H, flange-mount metal housing, dual-antenna heading, SD logging
HB50HCompact, low-power headingmosaic-G5 P3H, dual-antenna heading, 20 Hz, 0.60 W
HB59 OEM boardIntegration into vessel electronicsAsteRx-m3 Pro+, Ethernet, 3 UART, 0.15° heading, 100 Hz, <10 ms latency, 4.5–12 V
EV288 antennaDeck-mounted heading antenna pairFull-band (L5, E6, L-band), 5/8-inch mount, IP67, vibration and salt-spray tested

All products are quote-based. For a complete datasheet, email sales@gnss-solutions.com. Browse all box receivers and GNSS boards.

Key facts

Marine GNSS receiver: key facts

A marine GNSS receiver with heading uses two antennas to give a vessel its position and true heading together, unaffected by steel hulls and engines. With RTK it reaches centimetre accuracy for survey and construction work.

  • Heading: dual-antenna true heading, about 0.15 degrees at 1 m antenna spacing
  • Position: metre level standalone, sub-metre with SBAS, about 1 to 2 cm with RTK
  • Signals: multi-band GPS, GLONASS, Galileo and BeiDou
  • Interference: AIM+ anti-jamming and anti-spoofing near radar and radio
  • Output: NMEA 0183 and Septentrio SBF for autopilots, ECDIS and loggers
  • Antenna: salt-spray tested EV288 full-band antenna

Related: anti-jamming GNSS, GNSS for autonomous vehicles and port and logistics GNSS. Further reading: Septentrio AIM+ jamming protection, RTCM correction standards.

Use cases

Marine applications

Uncrewed surface vessels
Position, true heading and fast output for autonomous survey and inspection USVs. See robotics GNSS.
Hydrographic survey boats
Centimetre RTK and true heading for bathymetry, sonar georeferencing and tide-independent heights. See survey and GIS.
Workboats and pilot boats
A GNSS compass for steering, autopilots and track keeping, without the magnetic deviation found on steel hulls.
Ports and terminals
Centimetre RTK and heading for port vehicles, straddle carriers and quayside equipment. See rail and logistics.
Dredging and marine construction
Positioning and heading for dredgers, barges and pontoons on marine construction sites. See construction and mining.
Quay and breakwater monitoring
Continuous RTK positions on quays, breakwaters and other harbour structures to track settlement. See deformation monitoring.
Integration

Easy to integrate on board

Navigation and autopilots
NMEA position and heading for navigation software and vessel autopilots; UART output for ArduPilot and PX4 on USVs. See our ArduPilot guide.
Corrections
RTCM v3 corrections from an NTRIP caster, a CORS network or your own shore base. See NTRIP and RTCM.
Logging and firmware
SD and microSD logging of raw SBF data for post-processing. Firmware and manuals on firmware downloads.
Use cases

Marine GNSS receivers for navigation, survey and autonomy

At sea, a GNSS receiver must deliver both position and heading on a moving, rolling platform, often near radar and radio transmitters. Eview marine GNSS receivers, powered by Septentrio modules, combine multi-band RTK with dual-antenna heading and AIM+ interference protection.

GNSS compass for vessels
A dual-antenna receiver works as a GNSS compass. It gives true heading that steel hulls and vessel motion do not disturb, a reliable input for a marine GPS navigation system or autopilot.
High accuracy marine GPS and ship docking
Standard marine GPS gives a few metres. Differential GPS for marine (SBAS) gets below a metre, and RTK from a shore base or NTRIP reaches centimetres for dredging, piling and ship docking.
Offshore survey and construction
Offshore survey GNSS and offshore construction GPS need accurate position and heading to place sensors, cables and structures, plus raw data logging for post-processing.
GNSS for marine autonomous vessels
Autonomous vessels and USVs need a compact receiver with heading at standstill and standard NMEA output for autonomous ship navigation GPS and autopilots.
GNSS receivers for ships
On commercial ships and workboats, a GNSS receiver for ships streams position and heading to bridge systems, ECDIS and data loggers.
Vessel tracking
For fleet and vessel tracking GPS, the same receivers feed on-board computers and telemetry links with reliable position and heading.
Marine channel survey and port operations
Marine channel survey GPS for dredging and depth checks, and vessel traffic service GNSS reference stations in ports, both rely on stable RTK position and heading.

See our heading receivers and GNSS antennas, or email sales@gnss-solutions.com.

FAQ

Marine GNSS heading: frequently asked questions

What is a marine GNSS heading receiver?

It is a receiver connected to two antennas that computes the direction between them from GNSS carrier-phase measurements. The result is true heading of 0.15° at 1 m spacing, available even when the vessel is stationary or moving slowly and unaffected by the magnetic deviation that steel hulls and engines cause in a magnetic compass.

Which Eview receiver should I use on a USV?

For small USVs, the 45 g HB6 Pro gives heading and pitch or roll at up to 20 Hz in RTK. For low power, the HB50H. For integration into custom vessel electronics with Ethernet and 3 UARTs, the HB59 OEM board with 100 Hz output and less than 10 ms latency.

How far apart should the two antennas be?

Heading accuracy is specified as 0.15° at 1 m antenna spacing, and a longer baseline improves heading accuracy. Mount both antennas at the same height with a clear sky view, away from masts, radar and other structures that cause multipath.

Do Eview marine receivers resist jamming?

Yes. All receivers use Septentrio AIM+ to suppress narrowband and wideband interference. Galileo OSNMA anti-spoofing is available on the HB50H and HB59, but not on mosaic-H products such as the HB6 Pro and HB56H. See anti-jamming vs anti-spoofing.

Which antenna suits a vessel?

The EV288 full-band antenna covers L5, E6 and L-band, uses a standard 5/8-inch mount and is IP67 rated, vibration tested and salt-spray tested. A heading system uses two antennas, ideally of the same model and mounted the same way.

What is the best GNSS receiver for marine navigation?

A multi-band receiver with two antennas, so it gives position and true heading together, with interference protection and NMEA 0183 output. For survey or construction work, choose one with RTK.

Can GNSS be used for ship docking and offshore construction?

Yes. With RTK corrections, a dual-antenna GNSS receiver gives centimetre position and precise heading, which supports ship docking aids, piling, cable laying and other offshore construction tasks.

What GNSS do autonomous ships and USVs use?

Autonomous ships and USVs use multi-band RTK GNSS with dual-antenna heading, so the autopilot knows position and direction even when the vessel is stationary, with interference protection and NMEA output.

Related reading

GNSS compass for vessels: dual-antenna headingChoosing a GNSS receiver for marine navigationHow to choose a GNSS antenna

Find the right heading receiver for your vessel

Tell us the vessel, antenna spacing and output you need, and we will recommend a receiver and antenna pair.

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