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5.3.5 Displaying AIS Information [TGT DATA]
Types of information displayed
There are two modes (simple and detail) to display AIS target information. The display items are
determined by the selected mode.
Display Item Detail mode Simple mode
NAME (ship name) Up to 20 characters
Call Sign Up to 7 characters
MMSI Up to 9 characters
COG (course over ground) or CTW (course through water)
0.1 ° unit
SOG (speed over ground) or STW (speed through water) 0.1 knot unit
CPA (closest point of approach) 0.01 nm unit
TCPA (time to CPA) 0.1 min unit
BRG (true bearing)
0.1 ° unit
Range 0.01 nm unit
HDG (heading bearing)
0.1 ° unit
ROT (rate of turn)
0.01 °/min
POSN (latitude / longitude) 0.0001’ unit
Destination (waypoint) Up to 20 characters
NAV Status Status (number)
Not displayed
If the numeric information of ROT is blank, the radar is receiving the AIS data which is cannot displayed.
In this case, you can only trust the turning direction which is indicated by the turn indicator. The turn
indicator is displayed on the AIS symbol as the line perpendicular to the heading direction. (See the
Section 5.1.2 "Types and Definitions of AIS Target Symbols")
If the numeric information of SOG or STW is 102.2kn, the target ship's speed is 102.2kn or over. Then the
system cannot calculate CPA and TCPA. Therefore, missing is indicated in the CPA and TCPA
information.
The detail mode displays the numeric data of only a single ship, the simple mode can display the numeric
data of up to two ships.
For NAV Status, one of the following statuses is displayed in accordance with Navigation Status:
No. Status
0 Under Way Using Engine
1 at Anchor
2 Not Under Command
3 Restricted Maneuverability
4 Constrained by Her Draft
5 Moored
6 Aground
7 Engaged in Fishing
8 Under Way Sailing
9 Reserved
10 Reserved
11-14 Reserved
15 Not Defined
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