Mercury - 5-Pin NMEA 2000 / CAN H Extension Harness 10 m 84-879171T11. OverviewSome boats have long, winding rigging paths that don't make cable routing easy. If your GPS antenna or IMU needs to sit way up front-or higher on the boat for clean reception-the Mercury 84-879171T11 Extension Harness gives you the distance to make that happen. With ten full meters to work with, you can run the cable exactly where it needs to go without stretching anything or forcing tight bends.. Key Features. 10-Met