C-Nav® Positioning Solutions

We offer a range of GNSS receivers and Precise Point Positioning – orbit and clock corrections services. Using both polar and geostationary satellites for delivery, we can offer a true global service from pole to pole. Our latest service uses Iridium® low earth orbit (LEO) satellites, solving historic problems of masking, high latitudes, and shrinking INMARSAT constellations.

Correction Services

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C-Nav® LEO Correction Service

The C-Nav® LEO Correction Service exclusively uses the Iridium® satellite communications network to deliver GNSS (GPS, GLONASS and Galileo) augmentation data to the C-NavX1 GNSS Receiver. Utilizing the Iridium® LEO satellite communications network we can offer a true global service from pole to pole.

Service Level – Horizontal Position Accuracy

  • C-Nav® LEO - <5cm 95%

C-Nav® Correction Service

C-Nav® correction service is the oldest precise point positioning corrections service, offering corrections for the C-Nav3050® and C-Nav5000®. The C-Nav5000® offers an improved accuracy level over legacy products implementing an improved positioning solution.

Service Level – Horizontal Position Accuracy

  • C-Nav5000®(SF3) – 5cm 95%
  • C-Nav3050®(SF2) – 8cm 95%
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Hemisphere Atlas® Correction Service

C-Nav® is an authorised reseller of the Atlas® corrections service. Atlas® GNSS global correction service provides correction data for GPS, GLONASS, BeiDou, and Galileo constellations.

Atlas® correction service is available on all Hemisphere Atlas-capable single- and multi-frequency, multi-GNSS hardware.

Service Level – Horizontal Position Accuracy

  • Atlas® H10 – 8cm 95%
  • Atlas® Basic – 50cm 95%

Service activation can be self-managed using C-Nav's Customer Portal.

*Corrections are available 24/7 for registered customers with a 1 hour or better response time when using the web request form, customer portal, or contacting via email/phone.


C-NavX3™ GNSS Receiver

The C-NavX3™ GNSS Receiver is a multi-frequency dual antenna position and heading receiver. It offers sub-decimeter level position accuracy when combined with C-Nav® LEO correction service, delivered via Iridium Burst®. The C-NavX3 provides sub-degree dual GNSS heading and pitch or roll, and offers integrated UHF radio, cellular modem (LTE), Bluetooth, and Wi-Fi capabilities.

C-NavX1™ GNSS Receiver

The C-NavX1 is a quad-band GNSS receiver built to deliver precise positioning for the most challenging of marine operations. Supports decimeter-level multi-constellation positioning utilizing the latest C-Nav® LEO correction service delivering precise positioning from pole to pole through the Iridium® LEO satellite communications network.

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Vector™ VS1000 GNSS Receiver

Oceaneering is an authorized reseller of the Vector VS1000, Hemisphere® GNSS’ premiere multi-GNSS, multi-frequency receiver designed specifically for the professional marine market. Providing precise heading, Athena RTK positioning, and full Atlas capability, its rugged design is compliant to IP67, MILSTD-810G, MIL-STD-202F, and IEC 60068-2 standards.

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Hemisphere® R632 Receiver

The Hemisphere® R632 receiver is an exceptionally compact package with an up to 0.01° heading accuracy. The receiver is developed on Hemisphere’s® next generation technologies, bringing astounding interference rejection and multipath mitigation. The Hemisphere® R632 , tracks GPS, GLONASS, BeiDou (including Phase 3), Galileo, IRNSS, QZSS, and Atlas® L-band constellations( up to 4cm).

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Vector™ V500 GNSS Smart Antenna

Oceaneering is an authorized reseller of the Vector V500, Hemisphere® GNSS’ all-in-one multi- frequency, multi-GNSS smart antenna which provides RTK-level position and precise heading. This rugged design is sealed for the harshest environments and is a great solution for professional marine and other challenging applications.

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C-Nav1PPSI Converter/Combiner

The C-Nav1PPSI converter/combiner is a multi-function interface for GNSS receiver 1PPS signals. It has two opt-isolated 1PPS inputs, which are connected directly to the receiver's 1PPS outputs.

For high-integrity systems with dual GNSS receivers, the interface will "OR" the two TTL sources for output to peripherals that require a continuous 1PPS for time stamping. This output is maintained should either GNSS input fail.

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The SAAB R6 is a type approved IMO-compliant navigation system featuring sensor and 7" CDU(Control and Display Unit).
The R6 NAV includes a Bridge Alarm Management system, dual LAN interface, 1PPS output, 8 output and 5 input ports, IALA and RTCMv2 input, Multi constellation GLONASS, GALILEO and BeiDou GNSS.

The R6 comes in 2 variants the 'R6 NAV DGNSS' or 'R6 NAV PRO' model, with the PRO version giving access to Atlas® differential L-Band centimeter level corrections.


C Nav C NAV289 GNSS Antenna


The C-Nav289 is a GNSS antenna that tracks all GNSS constellations, C-Nav corrections, and SBAS satellites. It has special out of band rejection filters for INMARSAT and IRIDIUM®. It is housed in an all-polymer enclosure for marine application. The antenna is listed in the NOAA GNSS Antenna Calibration tables as C-Nav289.


C-Nav Combiner

The C-Nav Combiner enables the use of separate GNSS and L-band antennas. It is used in high-latitude operations where the low look angle of the separate L-band antenna enables reception of correction signals that is not possible with a standard integrated GNSS/L-band unit.

This combiner can be mounted on the mast or locally with the GNSS receiver.


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C-NaviGatorIV is the next generation of Control Display Unit providing real-time system accuracy and performance indicators for multiple GNSS receivers; with options for various NMEA inputs and outputs. Improvements over the previous generation include a larger higher resolution display, multiple Display port output for remote display expansion, AC/DC power options, double the USB ports and a move to Microsoft Windows platform. It is fully compliant with the latest guidelines for GNSS positioning within the oil and gas industry, as per IMCA standards.

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The C-Monitor application provides a graphical interface for supervising the operation and performance of one or more differential GNSS systems. It is compliant with the latest QA/QC guidelines for GNSS positioning within the oil and gas industry per the International Association of Oil & Gas Producers (IOGP) and the International Marine Contractors Association (IMCA).

The guidelines allow for pre-set user-defined alarm settings or limits, which can be set using the C-Monitor application.

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C-Scape position monitoring and situational awareness software provides independent real-time monitoring of any dynamic positioning (DP) system. The simple, intuitive interface furnishes situational awareness to users during drillship, dive boat, remotely operated vehicle (ROV) vessel, and other operations by blending multiple sensors with map file overlays.

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C-Tides is a worldwide tidal data software package that combines the exceptional vertical accuracy of the C-Nav3050 receiver with advanced ocean surface models to deliver real-time elevations relative to the mean sea surface (MSS) and EGM2008.

Two independent options are offered—an online package for real-time acquisition, and an offline package with post-processing and other advanced features. Accuracy is within accepted constituent limits to achieve IHO SP44 Order 1 or better[1].

[1] Subject to tidal regime limitation.


Installation Assistance

Our systems are user-friendly and easily installed with technicians on call 24/7 to answer your queries.

Engineers are also available to undertake ship-fits, and perform installations; Integrating DGNSS products with auxiliary bridge systems or dynamic positioning (DP) consoles.

Customer Training

Our support staff can work with you to carry out custom program requirements to meet specific educational goals, or work with ready to deliver all-encompassing programs.

Programs may include curriculum development, logistics support, Product learning and before/after skill benchmarking.

In-Person Courses

We offer in person courses in which participants learn more about the operation and maintenance of our products with an Oceaneering instructor at one of our six worldwide training locations.

Alternatively, the Oceaneering instructor can deliver product training at your facility, or using an online format.

Legacy Products

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C-Nav5000™ GNSS Receiver

The new C-Nav5000 GNSS Receiver builds on the previous C-Nav3050 technology. It provides 4cm-level position accuracy, using the C-Nav Correction Service (CCS). Powered by the new Onyx GNSS Engine the C-Nav5000 is capable of tracking GPS, GLONASS. It has all-in-view parallel tracking with 252 channels for navigation, SBAS and 3 channels for CCS. Includes 4 serial ports, USB, and up to 8 Ethernet connections.

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R330 GNSS Receiver

Oceaneering is an authorized reseller of the Hemipshere® R330 GNSS receiver–a full solution product in a compact enclosure. The R330 use the Hemisphere GNSS’ Eclipse™ platform and the latest GNSS patented technology. The R330 provides accurate positioning using several differential correction methods such as Athena™ RTK, Atlas® L-band corrections (Atlas Basic, H30, H10), Beacon, and SBAS. Patented Multifunction Application (MFA) firmware enables the R330 to smoothly transition between DGNSS systems.



The C-Nav3050 global navigation satellite system (GNSS) receiver provides 66-channel tracking with multi-constellation support for GPS, GLONASS, C-Nav™, and SBAS (WAAS/EGNOS) signals, and accepts external RTCM input corrections via the internet.

A choice of data rates makes corrections via the CSS over-the-internet (OTI) delivery option a practical solution for reception at higher latitudes and in shadow zones.

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The C-Nav286 is a GNSS antenna (AT1675-286) housed in a radome–thermoplastic enclosure. This antenna is listed in the NOAA GNSS Antenna Calibration tables as CNVC-NAV286.

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The AD591 antenna is a GNSS antenna (ALIAD591) housed in hard anodized, dichromate, and nickel-acetate–sealed aluminum with a 4-mm GRP pressure-molded radome. It has > 95 dB of out-of-band-rejection of the Inmarsat uplink.

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Standard Antennas

We offer both standard integrated and compact GNSS antennas, enabling excellent tracking performance. The compact antenna is listed in the NOAA GNSS Antenna Calibration tables as NAV-ANT3001R.

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C-NaviGator III

C-NaviGator III software is an intuitive touchscreen controller that provides real-time system accuracy and performance parameters for multiple GNSS receivers. The rugged and reliable wheelhouse-friendly display supports multiple NMEA inputs and outputs. It is fully compliant with the latest guidelines for GNSS positioning within the oil and gas industry per the International Association of Oil & Gas Producers and International Marine Contractors Association.

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