compass satellite

GC90 Satellite Compass Marine | 0.4° Heading Accuracy GPS GNSS Compass | Marinelite

Product Name: GC90 Satellite Compass Marine – High-Precision GPS GNSS Compass

Product Overview
The GC90 satellite compass marine system delivers true heading and positioning data using multi-constellation GNSS (GPS/BDS). With 0.4° RMS heading accuracy and a 60cm baseline, this marine GPS GNSS compass is engineered for yachts, workboats, and commercial vessels that demand reliable performance in dynamic sea conditions.

Why Choose GC90 as Your Satellite Compass Marine Solution?

Proven reliability – Hundreds of units already deployed in the Chinese market

Optional touchscreen display – Simplifies configuration and function settings

Dual output ports – Simultaneous HDT and GNSS data streams

Fast time-to-first-fix – Cold start ≤32 seconds, hot start ≤1 second

Attitude output – Pitch and roll accuracy of 0.4° RMS

Applications for Satellite Compass Marine GC90

Autopilot systems – True heading input

Radar & ECDIS – Stabilized overlay

Dynamic positioning – For DP1/DP2 vessels

Sailing yachts & fishing boats – Reliable heading without magnetic deviation

The GC90 series compass satellite adopts the principle of Global Navigation Satellite System (GNSS) to provide high-accuracy, high-precision ship's true heading data and positioning data for many marine navigation equipment.

FAQ OF THE GC90 Satellite Compass Marine

1. Q: What is the real-world heading accuracy of the GC90 satellite compass marine?
A: The GC90 satellite compass marine delivers 0.4° RMS heading accuracy under normal operating conditions, with a 60cm baseline dual-antenna design. In independent tests across hundreds of installations in the Chinese market, it has maintained this accuracy in dynamic sea states, outperforming many higher-priced marine GNSS compasses.

2. Q: Does the GC90 GPS GNSS compass work with both GPS and BeiDou?
A: Yes. The GC90 GPS GNSS compass supports GPS/GALILEO/BEIDOU/GLONASS (optional)  frequencies simultaneously. Using multiple constellations improves satellite availability, especially in harbors or near tall structures, ensuring continuous heading output.

3. Q: What optional accessories are available for the GC90 marine satellite compass?
A: An optional touchscreen display unit is available. It connects via CAN and allows you to easily configure GC90 settings, monitor heading/pitch/roll data, and customize output sentences without a PC. The display is designed for marine use with a sunlight-readable screen.

4. Q: Can the GC90 output both heading and attitude data (pitch/roll)?
A: Yes. Unlike many basic satellite compass marine products, the GC90 outputs true heading (HDT) as well as pitch and roll data with 0.4° RMS accuracy. This is critical for radar stabilization, dynamic positioning, and antenna pointing systems.

5. Q: How fast does the GC90 satellite compass achieve first fix after power-on?
A: The GC90 has a cold start time ≤32 seconds and hot start time ≤1 second. Recapture time after brief signal loss is also ≤1 second. This fast time-to-fix means your vessel's heading is available almost immediately upon power-up.

Technical parameters：

1. General

2. Interface

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3.Environmental conditions

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