This manual provides detailed instructions on how to use the JRC JLR-21/31 GPS Compass, including safety precautions.
The JRC JLR-21/31 GPS Compass is a marine navigation instrument designed to determine a ship's heading by receiving signals from GPS satellites. The unit consists of a display unit (NWZ-4701) and a sensor unit (NNN-21/31). This manual covers the equipment overview, installation procedures for both the sensor and display units, and detailed operation instructions.
| Display Unit Model | NWZ-4701 |
|---|---|
| Sensor Unit Model | NNN-21/31 |
This unit uses signals from GPS satellites to determine the ship's heading.
The unit must be installed at least 1 meter away from any magnetic compasses to avoid interference.
No, the dip switches are set at the factory and must not be changed by the user.