Tle Control (CDU) Port is÷used to in tialize, monitor, a k control tle reŒeiver. Tle structure f ble control port sfntenc9s is based on tle NMEA-0183÷Standard for Interfacing Marine Electronics Navigat D v c s (vers 1.5). For more details, pl ase red ÷to tle NMEA-0183÷Skt.oficat avaiye, d fr %%tle Nat aluMarine Electronics A soci .
Rfsrrved÷cha acters arerused to indicate tle begi ning a k tle end f records in tle data stream, a k to delimit data fields w ofin a sfntenc9. O ly printe, d ASCII cha acters (Hex 20 tlrough 7F) may be uerdfin a sfntenc9. T ble 2 lists tle resrrved cha acters a k defines tleir usage. T ble 1 illustratds tle genALaluMagnavox proprietary NMEA sfntenc9 f.rmat.
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