5 8
⑦ date
⑧ magnetic variation
⑨ mode indicator (‘A’, ‘D’, ‘E’, ‘M’ -> used; ‘N’ -> invalid)
Note that RMC has priority over VTG.
6-3-22 ROT – rate of turn
This sentence provides the rate and direction of turn.
$--ROT ,x.x ,A *hh<CR><LF>
① ②
① rate of turn
② status (‘A’ -> rate of turn is valid)
6-3-23 SSD – Ship Static Data
This sentence is used to enter static parameters into a shipboard AIS. The parameters in this
sentence support a number of the ITU-R M.1371 messages.
$--SSD
,c--c
,c--c
,xxx,xxx
,xx
,xx
,c
,aa
*hh<CR><LF>
① ② ③ ④ ⑤ ⑥ ⑦ ⑧
①
Ship's Call Sign, 1 to 7 characters
②
Ship's Name, 1 to 20 characters
③
Pos. ref., "A," distance from bow, 0 to 511 metres
④
Pos. ref., "B," distance from stern, 0 to 511 metres
⑤
Pos. ref., "C," distance from port beam, 0 to 63 metres
⑥
Pos. ref., "D," distance from starboard beam, 0 to 63 metres
⑦
DTE indicator flag
⑧
Source identifier
6-3-24 THS – True heading and status
Actual vessel heading in degrees true produced by any device or system producing true
heading. This sentence includes a “mode indicator” field providing critical safety related
information about the heading data, and replaces the deprecated HDT sentence.
$--THS
,x.x
,a
*hh<CR><LF>
① ②
①
Heading, degrees true
②
Mode indicator (see Note)
NOTE Mode indicator. This field should not be null.
A = Autonomous
E = Estimated (dead reckoning)
M = Manual input
S = Simulator mode
V = Data not valid (including standby)
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