NorthStar Navigation Explorer 721EU Call an Individual Individual, Retry a Routine Call

5-3 Call an Individual (INDIVIDUAL)

INDIVIDUAL

>ROUTINE SAFETY URGENCY

012345678

INDIVIDUAL

ROUTINE

> SEND?

ROUTINE

>MANUAL NEW BUDDY1 BUDDY2

12345678 INDIVIDUAL ROUTINE CALLING...

MANUAL MMSID 0––––––––

012345678 INDIVIDUAL ROUTINE WAITING ACK

012345678 INDIVIDUAL ROUTINE

> SET CHANNEL

INDIV ACK 012345678 PRESS PTT ESC –> EXIT

You can call anyone who has a radio with DSC functionality. You can set the priority level of the DSC call to routine, safety, urgency, or distress. Choose:

•ROUTINE to make a routine call

•SAFETY to send safety information

•URGENCY only when there’s a serious situation or problem that could lead to a distress situation

•DISTRESS only when there’s a distress situation.

1.Press CALL/MENU to enter the DSC CALL menu, then select INDIVIDUAL to call another person.

2.The cursor is at ROUTINE. Press ENT or press the rotary knob to make a routine call or select to another priority level.

3.The cursor is at MANUAL NEW. Press ENT or press the rotary knob to call a person who’s not in your buddy list; otherwise select the name of your buddy.

If you selected MANUAL NEW, enter the user MMSID and then press ENT or push the rotary knob.

4.Select the working channel and press ENT or press the rotary knob. (NOTE: If you’re making a distress call, the radio goes to CH16 automatically.) Duplex channels can’t usually be called and are automatically eliminated from the suggested call list. If the call is to a Coast Station, the radio will recognize this and select the correct channel.

5.The radio summarizes the call details and asks for confirmation to send the call (SEND?). Press ENT or push the rotary knob to send the call. The TX annunciator is displayed on the screen while the DSC call is being sent.

6.If the call is acknowledged (ACK), press PTT to talk. If there’s no reply to a routine call, try again (see Section 5-3-1).

5-3-1 Retry a Routine Call

VHF721

SEND AGAIN?

>YES CANCEL

1.If there’s no reply to your call after one minute (UNABLE TO ACKNOWLEDGE) the radio asks if you want to retry the call (SEND AGAIN?).

2.Select YES and press ENT or push the rotary knob to retry the call. If the call still can’t be placed, the radio returns to normal operation.

5-3-2 Acknowledge an Individual Incoming Call

RCV: INDIV

012345678

ENTER –> ACK

ESC –> EXIT

The Explorer 721EU requires the operator to manually send an acknowledgement to the requesting radio. Press ENT or push the rotary knob to send an acknowledge- ment or press ESC to cancel.

The Explorer 721US automatically sends an acknowledgement to the requesting radio within 10 seconds of receiving the call.

Northstar Explorer VHF Series: 721US, 721EU Operation and Installation Manual 31