Garmin VHF 315 Owners Manual PDF - Page 9
Placing Calls
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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 (Revoking a Distress Call, page 5). Stopping Automatic Retransmission of Distress Calls Select CANCEL. The radio remains tuned to channel 16. NOTE: Selecting CANCEL ends the automatic repetition of the call, but does not communicate to other stations that you no longer have an emergency. If you no longer have an emergency, you should revoke the distress call (Revoking a Distress Call, page 5). Revoking a Distress Call You do not transmit a distress call until you hold DISTRESS for at least three seconds. If you inadvertently make a distress call, or are no longer in distress, you should cancel the call immediately by transmitting a voice message to all stations on channel 16. 1 Select CANCEL > YES, and wait until DISTRESS CANCEL HAS BEEN SENT appears on the screen. 2 Select OK. 3 Hold PTT on the handset, and transmit an appropriate voice message to cancel the distress call (Distress Call Cancellation Script, page 5). 4 Select an option: • Select END to complete the distress-call cancellation and return to normal radio operation. • Select RESEND to resend the distress-call cancellation and start the process again. Distress Call Cancellation Script When you revoke a DSC distress call (Revoking a Distress Call, page 5), you should transmit an appropriate cancellation message. For example, "All stations, all stations, all stations, this is _____(vessel name), MMSI number ____, position ____(North or South), ____(West or East). Cancel my distress alert of ____(date and time). This is ____(vessel name), MMSI number ____. Out." Placing Calls Placing Individual Calls 1 Select DSC > INDIVIDUAL. 2 Select an option: • To enter the MMSI number manually, select MANUAL, enter the MMSI number, and select ACCEPT. • To select an entry from the directory, select DIRECTORY, and select an entry. • To select a recent call, select RECENT CALLS. 3 Select a channel (Individual Call or Group Call Channels, page 6). The radio transmits the request with your call. 4 Select CALL. The radio transmits the call on channel 70, and returns to the previous channel while listening for an acknowledgment on channel 70. After an acknowledgment is received, the radio changes to the channel you selected for the call. Placing Group Calls Before you can place a call to a group, you must enter the MMSI number of the group into the directory (Adding a Group, page 8). You can contact a group of specific vessels, such as a sailing club or flotilla, by making a group call. 1 Select DSC > GROUP > CALL. 2 Select a saved group. 3 Select a channel (Individual Call or Group Call Channels, page 6). The radio transmits the channel request with your call. 4 Select CALL. The radio transmits the call on channel 70, then changes to the selected channel. Placing All-Ships Calls All-ships calls are transmitted to all stations within receiving distance of your radio. You can make two types of all-ships Digital Selective Calling 5