The Steamrock GL-57 GNSS Logger receives, decodes, and prints a hard copy of GPS, Galileo, and GLONASS satellite navigation data, providing a paper backup log should the boat’s navigation equipment malfunction. Once every hour, a report containing the date, time, coordinates, SOG, COG, SMG, and CMG, along with a QR code containing this data, is automatically printed on thermal paper.
The Steamrock GL-57 is a standalone device using an external active GNSS antenna. It is powered by an onboard 12/24V power supply and has built-in overvoltage and overcurrent protection. This device requires no software updates, NMEA network, or internet connection. The Logger utilizes LED indicators, sound alerts, and printed system messages to reflect GNSS signal quality, self-diagnostics data, and power abnormality events (e.g., reverse polarity, overvoltage, power surges, spikes in the power supply, and overheating).




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