DIGITAL SELECTIVE CALLING
FM-4850 Operator’s Manual
Initiate position request call by manually entering an MMSI
number
Step 1 On the "POS REQUEST" page, select "MANUAL ID".
Step 2 Rotate and press the Menu/DSC control to enter the MMSI of an
individual contact, and then press the Menu/DSC control.
When CH70 is busy, you can wait without pressing any key until CH70
is idle.
When the CH70 is idle, the radio waits for an acknowledgement.
Step 3 When the radio receives an acknowledgement, the radio screen shows
the requested position information. Select the "OK" soft key or the Back
key to return to the home screen.
Note
If you receive an ACK from a ship that does not have location
information, it would be easier to understand that it is expressed as
"NO INFO" rather than "receive false position information".
4.7.2 How to Receive a Position Request Call
The "POSITION ACK" has three options: "MANUAL", "AUTO", and "IGNORE". For
information about how to set the "POSITION ACK", see section 12.5 Position
Acknowledgement. When "POSITION ACK" is set to "IGNORE", your radio has no
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