NMEA is a plug-and-play communications standard used for connecting marine sensors and display units within ships and boats. Examples of marine electronic devices to include in a network are GPS receivers, autopilots, wind instruments, depth sounders, navigation instruments, engine instruments, and nautical chartplotters. NMEA 2000 professional set consists 2 x T-connectors, 2 x T-connectors with 2 socket, 2 x T-connectors with 4 sockets, outdoor cables with length of 2 m, 5 m and 10 m, female and male connector.