User's Manual

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JMA-9172-SA Instruction Manual > 5.OPERATION OF TARGET TRACKING AND AIS > 5.3 AIS OPERATION
5.3.5 Displaying AIS Information [TGT DATA]
5.3.5.1 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.
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:
Display Item
i
i. 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.
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)
0.1kn unit
CPA (closest point of approach)
ii
ii. 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.
0.01NM unit
TCPA (time to CPA) 0.1min unit
BRG (true bearing) 0.1° unit Not
displayed
Range 0.01NM unit
HDG (heading bearing) 0.1° unit
ROT (rate of turn)
iii
iii. If the numeric information of ROT is blank, the radar is receiving the AIS data which is cannot dis-
played. 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 direc-
tion. (See the Section 5.1.2.2 "Types and Definitions of AIS Target Symbols")
0.01° /min
POSN (latitude / longitude) 0.0001' unit
Destination (waypoint) Up to 20
characters
NAV Status Status (number)
No. Status
0 Under Way Using Engine
1at Anchor
2 Not Under Command
3 Restricted Manoeuvrability
4 Constrained by Her Draft
5 Moored
6 Aground
7 Engaged in Fishing
8 Under Way Sailing