Mercury - NMEA 2000 Termination Resistor (Female) Network End Resistor 8M6004831. Overview. Every NMEA 2000 backbone needs two termination points-one male and one female-to keep the network stable and prevent data noise. The Mercury 8M6004831 NMEA 2000 Female Resistor provides one of those end-of-line terminations. It installs at either end of the backbone (whichever side uses a female port) and helps ensure clean, reliable communication between all N2K devices on board.. Key Features. Female-Te