Send An All Ships Call - Humminbird VHF255S-DSC User Manual

Tm366-usa 25/1 watt vhf/fm

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Table of Contents

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calls. The call at the end of the list is automatically

erased. The earliest call stored at the end of the list.

There is 10 calls could be stored

DISTRESS Log

llow a review of all stored Distress calls by number

and time of call. The call at the end of the list is

automatically erased. The earliest call

the end of the list. There is also 10 calls could be

stored.

POS REQUEST

The option enables you to request GPS position

information from any vessel for which an MMSID

number is known, such request can pick up from

buddy list or manual entry.

EXIT

quit the menu mode

DISTRESS

A specific Distress key is used to make the distress

call.

The call will send out the position and time information

from the input NMEA data along with your MMSI

number. This digital information lets other ships and

shore equipped with appropriate DSC equipment

know where you are and that you are in a distress

situation, except immediate help is needed, never use

the distress call.

5.2.1

Sending a distress Call

Note: Only having a MMSI code of your radio and DSC enable, can

you initiate a DSC transmission how enter the MMSI code see 6.9.1.

Open the red cover label DISTRESS.

Press the DISTRESS key momentarily.

The Text area of the display reconfigures to show the Nature of

Distress menu.

DISTRES CALL

>UNDEFINED

FIRE

COUNTING

FLOODING

DOW...

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stored at

DISTRES SENT

AWATTING ACK

AUTO

RETRANSMIT

If time is available, rotate the CH knob to select the Nature of Distress,

the default are "UNDEFINED".

Hold down the DISTRESS key for more than 3 seconds, until you see

the distress call sent message on the screen, the whole display screen

to flash and beep loudly.

If DISTRESS button is released before 3 seconds, the initiation of

distress call is not taken into effect and If button is pressed for more

than 3 seconds, DISTRESS call is sent whether channel 70 is busy or

not. When Distress is sent, the acoustic alarm goes to a continuous tone

until acknowledgement received or the DISTRESS call is cancelled.

during the distress call sequence, the radio simultaneously watches

Channel 70 for a DSC acknowledgement and Channel 16.

when the distress call is acknowledged, the acoustic alarm stops and

the radio returns to normal operation on channel 16, with high power

relay to the connected station via the microphone

If no acknowledgement is received, the unit retransmits the DISTRESS

call at random intervals of 3.5 to 4.5 minutes until a response is received

or the call is manually cancelled, by pressing CANCEL button for two

seconds.

5.2.2