39
Northstar
Explorer VHF Series: 721/725
Operation and Installation Manual
The 721/725 US responds automatically but the 721/725 EU 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).
5-12 Receive a Group Call (RCV: GROUP)
When you receive notification of a GROUP call, press any key to cancel the alert.
The radio automatically selects the channel designated in the incoming call.
The priority level is always routine, and the group is identified on the screen. The
group will be one of the three groups of frequently called people that you set up
earlier (see Section 4-3).
You don’t need to send an acknowledgement. If desired, press PTT to initiate voice contact on the
designated channel.
The call data is stored in the Call Log (see Section 5-7).
5-13 Receive a Geographic Call (RCV: GEOGRAPH)
Alternating
GEOGRAPHICAL
ROUTINE
VHF721
ENT –> ACCEPT
16 CHANNEL
REQUEST
ESC –> EXIT
A geographic call is sent to all vessels within a specific geographic boundary area.
When you receive notification of a GEOGRAPH call, press any key to cancel the alert.
The radio will select the channel designated in the incoming call by pressing the ENT key.
The user MMSI or name are displayed on the screen. If the radio recognises the user MMSI as one of your
buddies, the buddy’s name is displayed in place of the user MMSI.
Monitor the working channel for an announcement from the calling vessel.
5-14 Receive a Polled Position Call (RCV:POSITION)
Alternating
POSITION ACK
BUDDY
ESC –> EXIT
POSITION ACK
12:45 UTC
82º50 .003’N
27º45 .543’W
When you receive GPS position data from a buddy in response to your LL request (see Section 5-9), you’re
recommended to make a written note of the position, especially if it’s a good fishing position.
If enhanced LL position information is available from your buddy, it’s shown on the LCD until the display
changes.
RCV: GROUP
GP: RD GROUP
VHF721
ESC –> EXIT
