Furuno FR-1908V-BB Operator's Manual page 123

ROT : Rate of Turn
$GPROT,x.x,A*hh<CR><LF>
1 2
1. Rate of turn, deg/min, "-"=bow turns to port (-9999.9 - 9999.9)
2. Status: A=data valid, V=data invalid
RSA : Rudder Sensor Angle
$**RSA,x.x,A,x.x,A*hhCR>&ltLF>
1 2 3 4
1. Starboard(or single) rudder sensor data (-180 - 180.0, NULL)
2. Starboard(or single) rudder sensor status (A=Vaild N=Data invalid)
3. Port rudder sensor data (-180 - 180.0, NULL)
4. Port rudder sensor status (A=Vaild N=Data invalid)
THS : True heading & status
$**THS,xxx.x,a*hh<CR><LF>
1 2
1. Heading, degrees True (0.00 to 360.00)
2. Mode indicator (A=autonomous E=estimated M=manual input
S=simulator V=data not valid)
VDM: AIS VHF data-link message
$**VDM,x,x,x,x,s--s,x,*hh<CR><LF>
1 2 3 4 5 6
1. Total number of sentences needed to transfer the message (1 to 9)
2. Message sentence number (1 to 9)
3. Sequential message identifier (0 to 9, NULL)
4. AIS channel Number (A or B)
5. Encapsulated ITU-R M.1371 radio message (1 - 63 bytes)
6. Number of fill-bits (0 to 5)
VDO: AIS VHF data-link own-vessel report
!AIVDO,x,x,x,x,s--s,x,*hh<CR><LF>
1 2 3 4 5 6
1. Total number of sentences needed to transfer the message (1 to 9)
2. Message sentence number (1 to 9)
3. Sequential message identifier (0 to 9, NULL)
4. AIS channel Number (A or B)
5. Encapsulated ITU-R M.1371 radio message (1 - 63 bytes)
6. Number of fill-bits (0 to 5)
VHW : Water speed and heading
$GPVHW,x.x,T,x.x,M,x.x,N,x.x,K,*hh <CR><LF>
1 2 3 4 5 6 7 8
1. Heading, degrees (0.0 - 359.9, NULL)
2. T=True (fixed)
3. Heading, degrees (0.0 - 359.9, NULL)
4. M=Magnetic (fixed)
5. Speed, knots (0.0 - 9999.9)
6. N=Knots (fixed)
7. Speed, knots (0.0 - 9999.9)
8. K=km/hr (fixed)
APPENDIX 3 DIGITAL INTERFACE (IEC61162-1)
AP-9