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Lowrance - LVR-250 Installation and Operation Instructions 41
5-3 Receiving DSC Calls
Several types of DSC calls can be received from vessels within range at various priority levels:
DISTRESS
See Section 6.
ALL SHIPS Urgency, Safety, Routine or Distress priority (see Section 5-3-1)
INDIVIDUAL Urgency, Safety, Routine or Distress priority (see Section 5-3-2)
GROUP Routine priority only (see Section 5-3-3)
GEOGRAPHIC Routine priority only (see Section 5-3-4)
POLLED POSITION Routine or Safety priority (see Section 5-3-5)
In addition to the audible alert, the telephone icon will flash on the screen.
5-3-1 Receiving an All Ships Call (ALL SHIPS)
When you receive notification of an ALL SHIP call, press any key to cancel the alert. 1.
Press ENT to switch to the designated working channel manually; press EXIT to return
to old CH. The priority level and the user MMSI 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.
No acknowledgement is required. Press PTT to initiate voice contact on CH16 and then
2.
switch to the designated working channel.
The call data is stored in the Call Log (see Section 5-2-7).
5-3-2 Receiving an Individual Call (INDIV)
When you receive notification of an INDIV call, press any key to cancel the alert. The 1.
radio manually selects the channel designated in the incoming call by pressing ENT key.
INDIV calls are almost always Routine priority.
If the radio recognises the user MMSI as one of your buddies, the buddy’s name is
displayed in place of the user MMSI.
The LVR-250 US responds automatically to acknowledge the incoming call. The LVR-250
2.
EU responds manually.
Alternating
Alternating
14 CHANNEL
REQUEST
ACCEPT –> ENT
ESC –> EXIT
ALL SHIPS
SAFETY
FROM
TOM
REV: INDIV
TOM
ROUTINE
ACK –> ENT
14 CHANNEL
REQUEST
ESC –> EXIT