Positioning Products and Services

We offer a broad range of receiver options and subscription services, including a choice of two redundant satellite clock and orbit correction data messages:
C-NavC¹® or C-NavC²®. Each is simultaneously broadcast across the globe by Six Inmarsat geosynchronous satellites.


C Nav 5000


The new C-Nav5000 GNSS Receiver builds on the previous C-Nav3050 technology. It provides 5cm-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, BeiDou, and Galileo. 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. With patented interference rejection and anti-jamming capabilities, and hardware capable of future enhancements, this will be a leading receiver well into the future.

GNSS receiver, C-Nav3050


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.

GNSS receiver, C-Nav7000


The C-Nav7000 is a rack-mounted, user-friendly, and configurable multi-correction–source GNSS receiver housed in a ruggedized 19-in (2U) rack-mount unit, providing you with several correction options, as well as access to visual indicators of correction options.

The receiver enables you to make the most of the many features we offer, including: correction source prioritization, all-in-view parallel tracking of 66 channels, built-in C-NavC¹ or C-NavC² L-band receivers, and a variety of QA/QC applications.

ring laser gyro, C-Mariner


The C-Mariner up-scalable ring laser gyro (RLG) system is based on technology developed at Honeywell Aerospace, with a proven track record of over 3.6 billion operational hours.

The C-Mariner system is optimized for integration with the C-Nav3050 receiver, and is upgradable to output heading, pitch, roll, heave, position, and velocity. It is a fully compliant inertial navigation system (INS).

C Nav1PPSI Converter Combiner

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.


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.


GNSS antenna, AD591


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.

GNSS, standard antenna

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.

GNSS base antenna

Base Antenna

The integrated base GNSS antenna (PN: NAV82-001021-3001LF) tracks multiple signals. It is designed to reduce multipath error to provide better real-time kinematic (RTK) corrections to the rover network. It has excellent tracking performance and a stable phase center.

The antenna is listed in the NOAA GNSS Antenna Calibration tables as NCT-ANT3001B.

GNSS airborne antenna

Airborne Antenna

The airborne antenna (NAV82-001022-3001LF) tracks multiple signals and is designed to reduce multipath error to provide better RTK corrections to the rover network. It has excellent tracking performance and a stable phase center.

The antenna is listed in the NOAA GNSS Antenna Calibration tables as NCT-ANT3001A.

GNSS signal converter, signal combiner, C-Nav combiner

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.

Legacy Antennas

GNSS antenna, C-Nav286


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


C-NaviGator III, GNSS control, touchscreen

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.

GNSS, position monitoring, C-Monitor


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.

DP system monitoring, situational awareness, C-Scape


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.

tidal data software, C-Tides


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.

C-NavC1 and C-NavC2

C-NavC¹ and C-NavC² correction service licenses are available for Net-1 and Net-2 satellites, to which all service users have unlimited access.

We also provide satellite coverage information in multiple formats.

*At one sigma within adequate Inmarsat and GNSS satellite visibility

Correction Services

Contact Us | Positioning Products and Services

Company page Since our founding in the early 1960s, Oceaneering has expanded and grown globally to service several industries such as the offshore energy industry, defense, entertainment, material handling, aerospace, science, and renewable energy industries. In 1964, Mike Hughes and Johnny Johnson formed a Gulf of Mexico diving company called World Wide Divers. The company grew in response to increasing demand for their services and in 1969 merged with two other diving companies to form Oceaneering International, Inc. To solve the toughest challenges, we do things differently, creatively, and smarter. As your trusted partner, our unmatched experience and truly innovative portfolio of technologies and solutions give us the flexibility to adapt and evolve, regardless of market conditions. Our mission is to solve the unsolvable. We thrive by creating industry-changing technically creative solutions for the most complex operational challenges under water, on land, and in space. Our five core values establish a common culture and demonstrate what is most important for us as a company. Since the beginning, the company has transformed from a small regional diving company into a global provider of engineered products and services. Today, we develop products and services for use throughout the lifecycle of an offshore oilfield, from drilling to decommissioning. We operate the world's premier fleet of work class ROVs. Additionally, we are a leader in offshore oilfield maintenance services, umbilicals, subsea hardware, and tooling. We also serve the aerospace, defense, and theme park industries. Underpinning everything we do, safety is not only the foundation of our core values, but it is vital to our unmatched performance record and company culture. The industries we serve are as diverse as they are complex. Whether we are engineering deepwater umbilicals or developing robotics for aerospace applications, the safety and health of our employees, vendors, and customers is an integral part of our day-to-day business. If we are working, then our responsibility is to be working safely. Since our inception in 1964, we have placed a high value on employee safety—from diving services and subsea inspection to vessel-based installation operations. We have and will continue to evolve not only our health, safety, and environmental (HSE) processes, but those of the industries in which we work. Although we have been fatality-free since 1999, our HSE journey goes beyond statistics. As our portfolio of services has grown, we have continued to prioritize and advance our approach to HSE.