Onwa Marine Electronics KV-300 - Manual (Page 23)

Hold down DISTRESS KEY for 5 seconds as confirmation.
An acoustic alert sign will emit(70CH)and the distress call will be
carried out.
While the screen displays "WAIT FOR ACK KEEP PRESS16 TO CANNEL"
Click the 16 keys, LCD display "CANNEL DISTRSEE" while 70 channels
transmit a reply message, the alarm sound disappeared, returned 16
channel display.
If the distress call is received and confirmed by another station, the
alert sign will stop and the display will return to normal use in VHF
model on channel 16 (70CH sending on high transmission power.)
If no confirmation is received,the unit will send again the distress call
at intermission of 4 minutes (even with channel 70 in use) until a
confirmation is received .
User manually cancel the call through press 16 (distress cancell)
buttons or PTT With the UP/DOWN keys scroll through the digits and
insert UTC
8.8 Position Request
It is possible to send a DSC call to requie the position of a DSC station
(it may be preset in the directory or manually inserted).
Press MENU/SELECT as confirmation
Scroll through the channels with the UP/DOWN keys
Select POS REQUEST and confirm by pushing MENU/SELECT
You will be asked a MMSI code, which may be manually inserted or
found in the directory
Select MANUAL INPUT or DIRECTORY with the UP/DOWN keys
Insert the code with the UP/DOWN keys (in case of manual selection)
and press MENU/SELECT as confirmation
The request will be sent to the selected DSC station and the display will
show WAITING ACK.
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Hold down the MENU/SELECT key till the display indicates DSC CALL