
86
A.5.21
SPW - Security Password Sentence
This sentence can be used for authentication. For this purpose the sentence has to be
applied before the protected sentence (for example EPV, SSD).
$--SPW,ccc,c--c,x,c--c*hh<CR><LF>
Field No. Format Description
Remark
1
ccc
Password protected sentence
2
c--c
Unique Identifier
3
x
Password level
4
c--c
Password
A.5.22
SSD – AIS Ship Static Data
This sentence is used to enter static parameters into a shipboard AIS unit. 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>
Field No. Format Description
Remark
1
c—c
Ship’s call sign
2
c—c
Ship’s name
3
xxx
Pos. ref., point dist.“A,”
4
xxx
Pos. ref.,point dist. “B,”
5
xx
Pos. ref., point dist.“C,”
6
xx
Pos. ref.,point dist. “D,”
7
c
DTE indicator flag
8
aa
Source identifier
A.5.23
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>
Field No. Format Description
Remark
1
x.x
Heading, degrees true
2
a
Mode indicator
A.5.24
VBW – Dual Ground/Water Speed
Water-referenced and ground-referenced speed data.
$--VBW, x.x, x.x, A, x.x, x.x, A, x.x, A, x.x, A*hh<CR><LF>
Field No. Forma
t
Description
Remark
1
x.x
Longitudinal water speed, knots
ignored
2
x.x
Transverse water speed , knots
ignored
3
A
Status : water speed, A = data valid, V = data
invalid
ignored
4
x.x
Longitudinal ground speed , knots
5
x.x
Transverse ground speed , knots
87
6
A
Status , ground speed, A = data valid, V = data
invalid
7
x.x
Stern transverse water speed , knots
ignored
8
A
Status : stern water speed,A = data valid, V =
data invalid
ignored
9
x.x
Stern transverse ground speed ,knots
ignored
10
A
Status : stern ground speed,A = data valid, V =
data invalid
ignored
A.5.25
VHW – Water Speed and Heading
The compass heading to which the vessel points and the speed of the vessel relative to the
water.
A.5.26
VSD – AIS Voyage Static Data
This sentence is used to enter information about a ship’s transit that remains relatively static
during the voyage.
$--VSD,x.x,x.x,x.x,c—c,hhmmss.ss,xx,xx,x.x,x.x*hh<CR><LF>
Field No.
Format
Description
Remark
1
x.x
Type of ship and cargo category
2
x.x
Maximum present static draught
3
x.x
Persons on-board
4
c—c
Destination
5
hhmmss.ss Estimated UTC of arrival at destination
6
xx
Estimated day of arrival at destination
7
xx
Estimated month of arrival at destination
8
x.x
Navigational status
9
x.x
Regional application flags
A.5.27
VTG – Course Over Ground and Ground Speed
The actual course and speed relative to the ground.
$--VTG, x.x, T, x.x, M, x.x, N, x.x, K,a*hh<CR><LF>
Field No. Format Description
Remark
1
x.x, T
Course over ground, degrees true
2
x.x, M
Course over ground, degrees magnetic
ignored
3
x.x, N
Speed over ground, knots
4
x.x, K
Speed over ground, km/h
ignored
5
a
Mode indicator
$--VHW, x.x, T, x.x, M, x.x, N, x.x, K*hh<CR><LF>
Field No. Format Description
Remark
1
x.x, T Heading, degrees true
2
x.x, M Heading, degrees magnetic
Ignored
3
x.x, N Speed, knots
Ignored
4
x.x, K Speed, km/h
Ignored