Position-Tracking Polling Interval Sequence
Regulations allow transmission of one position-request call every five minutes. When tracking more than one
vessel, the radio alternates calling each vessel in the list at five-minute intervals. If a vessel does not respond to
five consecutive position-request calls, the radio removes the vessel from the position-tracking list.
You can use this table to better understand how the time interval is applied to the vessels in the position-
tracking list.
Vessel
Time
Ship 1
0 minutes (immediately when starting position tracking)
Ship 2
5 minutes
Ship 3
10 minutes
Ship 1
15 minutes
Ship 2
20 minutes
Ship 3
25 minutes
Viewing and Deactivating Vessels on the Position Tracking List
You can deactivate vessels that you want to keep in the tracking list, but do not want to actively track.
1 Select DSC > POS. TRACKING > VESSELS.
2 Select a vessel.
3 Select OFF.
Deleting a Vessel From the Position Tracking List
You can delete vessels from the tracking list that you don't plan to track in the future.
1 Select DSC > POS. TRACKING > DELETE.
2 Select a vessel.
3 Select YES.
16
Digital Selective Calling
