Overview

The Garmin 010-12824-00 is a power and NMEA 0183 data cable harness for the Garmin AIS 800 Blackbox Transceiver. It brings the transceiver onto the boat’s DC supply and breaks out the conductors you need for basic power, NMEA 0183 talk/listen wiring, and optional control inputs.

This harness uses color-coded leads for fast troubleshooting during install or service: red for power, black for ground, purple and gray for NMEA 0183 receive (RxA/RxB), blue and brown for NMEA 0183 transmit (TxA/TxB), plus yellow (Accessory On) and green (silent mode). It also supports Safety-Related Messages (SRM) over the AIS 800’s NMEA 0183 interface.

Key features

• Built for the Garmin AIS 800 Blackbox Transceiver power and NMEA 0183 connection
• Power leads for vessel DC wiring: red (+) and black (-)
• NMEA 0183 receive pair: purple RxA (+) and gray RxB (-)
• NMEA 0183 transmit pair: blue TxA (+) and brown TxB (-)
• Yellow Accessory On lead for switched installations in NMEA 0183 systems
• Green silent mode lead for an optional toggle that sets the unit to receive-only

Installation and setup

Route the harness from the AIS 800 to your DC distribution and secure it so it cannot chafe in vibration. Leave a drip loop where it enters a console or electronics box, and keep the run tidy around the transceiver so the connector and strain relief are not taking the load.

Connect red to the positive feed and black to the negative ground, using appropriate overcurrent protection and marine-grade terminations. If you want a helm switch, the yellow Accessory On lead is used in NMEA 0183 setups; the green lead can be put on a switch to quickly revert the AIS 800 to silent mode when needed.

Electrical and system integration

Use the NMEA 0183 pairs when you need to pass AIS data to or from a chartplotter, PC, VHF, or other NMEA 0183 talker/listener. Match the + and - conductors as pairs (RxA/RxB and TxA/TxB), and maintain good separation from high-current wiring to keep noise out of the data lines.

On boats running NMEA 2000, the AIS 800 still uses a dedicated power connection and does not draw power from the backbone. In that type of network, the yellow Accessory On lead is not required for automatic power control.

Compatibility and fit

This cable is intended for Garmin AIS 800 installations and replacements. Confirm your transceiver model and the port you are connecting to before ordering, especially if you are replacing an older harness or working around existing splices in the boat.