Start Tracking as follows:

DSC CALL

DIST LOG

LL REQUEST

>TRACK BUDDY

TRACK BUDDY

>START TRACK SET BUDDY TRACKLIST

START TRACK

BUDDY1 OFF

BUDDY2 ON

BUDDY3 OFF

START TRACK

>YES NO

PRESS ENTER

1.Press CALL/MENU to enter the DSC CALL menu, then select TRACK BUDDY.

2.Select START TRACK, then select YES. The START TRACK display changes to STOP TRACK. To stop tracking at any time, just select YES.

As soon as you start tracking, an LL Request is sent immediately on CH70 and your radio waits for acknowledgement of the (first) buddy’s LL position to be displayed on your LCD.

Each of the selected buddies is polled for their LL positions at regular time intervals. When information is received, a friendly ringtone is sounded and the position is shown on the LCD. Press any key to cancel the display.

An LL position that is received is not stored in your radio’s log, but is broadcast over NAVBUS to the chartplotters. Press any key to acknowledge or wait for the automatic 20 second timeout.

NOTE: The Explorer 721 can receive and display the LL position data at normal or enhanced resolution.

5-10 Receive an All Ships Call (RCV: ALL SHIP)

RCV: ALL SHIP

priority

VHF721

ESC –> EXIT

When you receive notification of an ALL SHIP call, press any key to cancel the alert. The radio automatically selects CH16.

The priority level and the user MMSID are displayed on the LCD. If the radio recognises the user MMSID as one of your buddies, the buddy’s name is displayed in place of the user MMSID.

No acknowledgement is required. Press PTT to initiate voice contact on CH16 and then switch to a working channel.

The call data is stored in the Call Log (see Section 5-7).

5-11 Receive an Individual Call (RCV: INDIV)

RCV: INDIV

VHF721

ENTER –> ACK

ESC –> EXIT

INDIV ACK

VHF721

PRESS PTT

ESC –> EXIT

When you receive notification of an INDIV call, press any key to cancel the alert.

The radio automatically selects the channel designated in the incoming call. INDIV calls are almost always routine priority.

If the radio recognises the user MMSID as one of your buddies, the buddy’s name is displayed in place of the user MMSID.

The 721US responds automatically but the 721EU prompts you to press ENT or push the rotary knob to acknowledge the incoming call.

The caller should respond to your acknowledgement by making voice contact on the designated channel. If this doesn’t happen, you can press PTT to initiate voice contact instead.

The call data is stored in the Call Log (see Section 5-7).

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

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NorthStar Navigation Explorer 721EU Receive an All Ships Call RCV ALL Ship, Receive an Individual Call RCV Indiv