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AP50 system, NMEA 183 messages
(applies for J50 and NI300X sw release V1R2 onwards)
Sentence Formatter mnemonic code
Bold = recommended navigator/instr. output for autopilot
Italic = IMO designated
( ) = not for new designs
Data source:
(A=autop., C=comp., I=instr. sensor, N=navigator)
Accept. condition: No nav/pos (n/p) flag warning
Status flag
n/p= nav/pos data warning
Nav Data
Destination wp position
Destination wp ident.
Origin wp ident.
Bearing wp-wp, T
Bearing wp-wp, M
Bearing pos-wp, T
Bearing pos-wp, M
Distance pos-wp
XTE
Position Data
Present position Lat, Long
COG, T
COG, M
Magnetic variation
Speed over ground (SOG)
Speed Data
Speed through water (LOG)
Depth Data
Depth relative to transducer
Wind Data
Apparent wind angle
Apparent wind speed
Heading Data
Compass heading, T
Compass heading, M
Rate of turn*
Rudder Data
Rudder angle
Rudder command
Rudder angle limit
Rudder status
Steering control
Commanded heading T/M
Commanded ROT/radius
Selected steering mode
Off heading limit
Off heading status
RX: J50-1, NI300X
x = input messages accepted
J50-2
GI51
TX: J50-1, 1Hz Installation setup
J50-1, 5Hz Installation setup
J50-1, VDR Installation setup
J50-2
NI300X
GI51
GI50
Normal sentence length (bytes)
Max sentence transmission rate (Hz)
N N N N N N
N
N N N N N N N
n
n
n
n
n
n
n
n
n
p
p
p
n
n
n
n
n
p*
p
p
2
1
3
6
7
5
1
3
2
4
3
1
2
3
4
2
1
3
4
2
1
4
2
1
3
3
2
1
2
1
3
4
5
2
3
1
4
1
2
1
3
2
5
1
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
.1 .1
.5 .2
.5
.1 .1
.5 .2
.5
.1 .1
.5 .2
.5
46 66 45 45 78 78 82 29 23 78 46 67 72 43 47 41 36 36 28 30 40 19
480
10 7 11 11 6
6
6 17 21 6 10 7
I
I
I
I
I
I
I
C
C
I,A
p
p
p
3
2
3
1
6
4
1*
2
3
2*
1
1
2
3
2
1
2
1
1**
3
2*
1
3
TX*
x
x
x
x*
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x*
x*
x
x
.5 .5
1*
1*
.5 .5
5*
5*
10* 10*
.5 .5
1*
1*
1**
10* 10*
1
10*
32
18
7 11 10 12 13 13 17 16 12 25
15
27
Remarks:
C
A
A
A
* DGPS if flag=2
*Only applicable if received on set nav. source ch.
* Longitudinal field
* Calculated as magn. heading + magvar.
TX
** Relative (geared synch./step) if PSIM identifier
2
TX
*TI, AG or II Talker Ident (ref. Inst. Manual)
TX
TX
TX
TX
TX TX
TX
TX
TX
TX
* J50-1 will only read speed, not heading
x
x
* Option switch to be set for NMEA speed reading
1
1
.1
* Either true or magn. is calc. value if magvar is available
1
5
.1
5
5
1
5
.1
* HDT if true, HDG if magn. steering compass
1
1
.1
* Either true or magn. is calc. value if magvar is available
*Absolute head. only.; **For rel. head: PSIM talker id. and 10Hz
* PS talker identifier (relative. heading)
19 27 27 82
25 18 18 6
Missing data
timeout (s)
10
10
45
10
45
10
45
10
45
10
45
10
45
10
45
10
45
6
20
10-20
20
60
20
45
20
45
10
70
2
15 45
na
15 45
na
45
na
45
na
45
2
4
2
4
2
2
10
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