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•
Type of vessel
•
Rotational speed/turn rate
Static information:
•
Call sign and name of the vessel
•
Length and width of the vessel
•
IMO-number of the vessel, if existent
•
Type of vehicle
•
Position of the GPS sensor onboard
Journey-related information:
•
Draught of the vessel
•
Type of cargo
•
Port of destination and estimated time of arrival (ETA)
•
Route plan, optional
The block of dynamic information is the most important block with regard
to threatening collisions. Therefore this block of information is transmitted
in a compulsory way, depending on the vessels movement. The following
table shows the mandatory repetition rate of the "Class A" Transceiver
linked to the ship's movement:
anchored vessels:
vessels at 0 – 14 kn:
vessels at 0 – 14 kn, fast maneuver:
vessels at 14 – 23 kn:
vessels at 14 – 23 kn, fast maneuver:
vessels at > 23kn:
vessels at > 23 kn, fast maneuver:
The static data such as information regarding the journey is dispersed every
6 minutes.
This data is sent in turns according to the stipulated period to the one
(161.975 MHz) and subsequently to the other channel (162.025MHz).
As mentioned previously, the „Class A" Transmitter operates with the so-
called SOTDMA method (self-organized time division multiple access).
3 minutes
10 seconds
3.3 seconds
6 seconds
2 seconds
2 seconds
2 seconds
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