Sending An Undesignated Distress Call; Sending A Designated Distress Call; Waiting For And Receiving And Acknowledgment For A Distress Call - Garmin VHF 315 Series Owner's Manual

Sending an Undesignated Distress Call

When you send an undesignated distress call, the nature of your emergency is not transmitted to the receiving
stations. Sending an undesignated distress call is a faster procedure that can save you time during an
emergency.
1 Lift the spring-loaded door, and hold DISTRESS for at least 3 seconds.
The radio beeps and counts down the seconds. DISTRESS CALL COUNTING DOWN appears on the screen.
The radio sounds an alarm, switches to channel 70, and transmits your call on high (25 W) power.
2 Press any key to silence the alarm sound.
The radio tunes to channel 16 on high (25 W) power.
3 Select PTT on the handset or radio to relay your distress message.
The radio waits for an acknowledgment (ACK) on channel 70 from a listening station.

Sending a Designated Distress Call

When you send a designated distress call, the nature of your emergency is transmitted to the receiving
stations.
1 Lift the spring-loaded door, and press DISTRESS.
2 Turn the ENTER dial, and select the type of distress call.
TIP: You can select CLEAR to exit the screen without sending a distress call.
3 Hold DISTRESS for at least three seconds.
The radio beeps and counts down the seconds. DISTRESS CALL COUNTING DOWN appears on the screen.
The radio sounds an alarm, switches to channel 70, and transmits your call on high (25 W) power.
4 Press any key to silence the alarm sound.
The radio tunes to channel 16 on high (25 W) power.
5 Select PTT on the handset or radio to relay your message.
The radio waits for an acknowledgment (ACK) on channel 70 from a listening station.

Waiting For and Receiving and Acknowledgment for a Distress Call

If the radio does not receive an acknowledgment for a distress call, the radio retransmits the distress call
randomly between 3.5 to 4.5 minutes later, and continues to retransmit the distress call at random intervals
until the radio receives an acknowledgment.
When the radio receives the acknowledgment, it begins beeping and DISTRSS ACK appears on the screen.
1 Press any key to turn off the beeping.
2 Select to view additional information.
TIP: If the MMSI of the station transmitting the acknowledgment signal is an entry in your directory, the
name associated with the MMSI number appears on the screen. If the MMSI of the station is not in your
directory, the MMSI number appears on the screen.
3 Select ACCEPT.
Pausing and Resuming Distress Call Retransmission
If the radio does not receive an acknowledgment for a distress call, the radio retransmits the distress call
randomly between 3.5 to 4.5 minutes later, and continues to retransmit the distress call at random intervals
until the radio receives an acknowledgment. You can pause and resume the retransmission countdown.
1 Send a designated or undesignated distress call.
2 Select PAUSE.
The distress-call-retransmission countdown stops.
3 Select an option:
• To resume the countdown, select RESUME.
• To revoke the distress call, select CANCEL
Digital Selective Calling
(Revoking a Distress Call, page 12).
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