August 2, 2017
measuring voltage on NMEA0183

Are you Positive about that Negative ?

A customer recently contacted us asking why he was measuring a negative voltage on his NMEA0183 Output and suggesting that his AIS had a fault. He confirmed that he had his multi-meter’s Red lead on the Output+ and the Black lead on the Output-, so how on earth could it […]
May 10, 2012
Testing NMEA0183

NMEA 0183 Display Program

NMEA 0183 has become the most widely adopted standard for data communication in the Marine industry. Based on the old RS232 Serial Interface used on computer terminals data is transmitted as a series of high and low voltages between two pieces of wire. Although fairly simple in principle, NMEA 0183 […]