236DSC OPERATION6 Distress callA distress call should be transmitted, if in the opinion of theMaster, the ship or a person is in distress and requires imme-diate assistance.NEVER USE THE DISTRESS CALL WHEN YOURSHIP OR A PERSON IS NOT IN AN EMERGENCY.A DISTRESS CALL CAN BE USED ONLY WHENIMMEDIATE HELP IS NEEDED.DD Simple callq Confirm no distress call is being received.w While lifting up the key cover, push [DISTRESS] for5 sec. to transmit the distress call.• Emergency channel (Channel 70) is automatically selected andthe distress call is transmitted.• When no GPS is connected, input your position and UTC time, ifpossible.• While pushing [DISTRESS], the key backlighting blinks.e After transmitting the distress call, the transceiver waits foran acknowledgment call on Channel 70.• The distress call is automatically transmitted every 3.5 to 4.5minutes.• After 2 sec., the transceiver is set to Channel 16 automatically.r After receiving the acknowledgment, reply using the mi-crophone.25W INTTAGReceivedDistressACK<Osaka Bay<CLR˘Beep Off> CALLINGDistress CallTX CompleteNow Waiting for ACK<CLR<CLR ˘CancelCancel ACK>ACK>After 2 sec.25W INTTAGWait ACK<CLR˘Cancel ACK> CALLINGDistress CallPush for 5 sec.

explicit definitions

in case of emergency

OPERATING RULES

i function display

weather channels

i receiving and transmitting

i call channel programming

i channel comments

i optional voice scrambler operation

scan operation

i setting tag channels

I Operation

i mmsi code check

i dsc address id

d deleting individual id

d programming group id

d deleting group id

i position and time programming

i position and time indication

i distress call

i transmitting dsc calls

d transmitting a group call

d transmitting an all ships call

d transmitting a position request call

i receiving dsc calls

d receiving a position request call

d receiving a polling request call

i received messages

d other messages

dsc set mode

i rx speaker function

i hailer operation

I Set mode items

set mode

connections and maintenance

i supplied accessories

i mounting the transceiver

I MB-75 installation

TROUBLESHOOTING

specifications and options

I Options

CHANNEL LIST

Icom iM504 Instruction Manual

iM504