Operation with a Fist Microphone |
The message NO GPS appears in NAVSTAT in the position where the type of device used to be. The NMEA indicator continues to flash until valid positional data is received. If valid positional data (from the same source) is later restored, the NMEA indicator is again displayed solid.
Operation When No Signal Detected for 4 Hours
If no valid positional data is received or input manually within 4 hours of the previous alert, the NMEA indicator continues to flash and the staccato alert tone is again emitted. This pattern is repeated every 4 hours if no positional data has been detected. If no manual input was made during the previous 23.5 hours, all the position fields are set to 9’s and the time and date fields are set to 8’s.
3.3.17Digital Selective Calling (DSC)
The Digital Selective Calling (DSC) protocol is a globally applied system used to send and receive digital Distress calls as well as Individual and All Ships calls on channel 70, the dedicated DSC channel for Marine VHF. For a Distress call transmission, your RAY215 takes the position and time information from the input NMEA data along with your Maritime Mobile Station Identifier (MMSI) and converts it into a digital "packet". When transmitted, this digital information lets other ships and shore stations know where you are and that you are in a Distress situation.
Communications in DSC mode include the following:
1.Transmitting/Receiving an Individual Call
2.Transmitting/Receiving an All Ships Call
3.Transmitting/Receiving a Distress Call (without designating type)
4.Receiving a Distress Relay Call (without designating type)
Individual, All Ships and Group DSC calls come in three varieties: ROUTINE for normal calls, SAFETY for advisory alerts, and URGENCY for assistance when life is not in immediate danger. To enable DSC mode, press and release the DSC/PRI and D/L/ I.C. keys simultaneously. The DSC indicator illuminates and a tone sounds. Since the Distress Call (enabled by pressing and holding the Distress Key for 4 consecutive seconds) automatically selects the DSC mode, it is not necessary to press the DSC/PRI and D/L / I.C. to make a distress call.
When a DSC call is received, the radio automatically enters DSC mode if you are currently on a selected working channel, in the Monitor mode, or in the Scan mode. You will not receive a DSC call if the radio is transmitting or receiving a
