Function - Midland neptune User Manual

7 USE WITH GPS

7.1 Function

If connected to a GPS receiver (GPS200), the transceiver will display the vessel position (latitude
and longitude), as well as time data. If information regarding position data are not received, in
the normal radio mode, time data does not appear and a minute-long warning tone will sound
(can be deactivated by pressing any button). This tone will sound every 4 hours, reminding the
user that position data needs to be inserted. The user may also insert the coordinates manually
as described in par. 10.6.
7.2 GPS information on the display
Refer to the following illustrations:
1. Position indicator
Displays GPS or manually-inserted coordinates.
2. Time indicator
Shows data supplied by the GPS or the transceiver's clock.
8 DIGITAL SELECTIVE CALLING (DSC)
8.1 Introduction
Digital Selective Calling is a semiautomatic method for controlling VHF, MF and HF radio calls.
It was also designed as part of the global marine security and emergency response system
(GMDSS). It is likely that DSC will eventually replace audio calls on emergency frequencies and
will be used to send urgent and routine radio-transmitted maritime security information. This new
service will allow crafts to send/receive calls of an emergency, urgent, security, or routine nature
to/from vessels equipped with a DSC transceiver.
To avoid accidentally sending a distress call or a call sent incorrectly, contact your vendor
or local authorities for updates on DSC operating and emergency procedures.
In European inland waterways DSC-function is not allowed.
8.2 Mobile Marine Identification Service (MMSI)
Important! To send/receive DSC calls, the user must program his personal MMSI code into the
transceiver. This is a nine-digit number used by marine transceivers equipped for DSC digital
selective calling. This number is used much like a telephone number for contacting other,
specific vessels. For further details on programming your MMSI, see par. 10.10.
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