RESEARCH CONCEPTS RC4000 Protocol page 37

RC4000 Antenna Controller
Read Navigation Data Command (continued)
byte 29
7 6 5 4
0 1 0 0 $ 0 X X X
bytes 30-34
byte 35
bytes 36-41
byte 42
bytes 43-50
bytes 51-58
byte 59
bytes 60-64
bytes 65-69
byte 70
byte 71
Appendix REM
true heading source
3 2 1 0
where 'XXX' is ...
001 – Currently no true heading data
010 – Automatically from fluxgate compass
011 – Manually from fluxgate compass
100 – Manually entered
101 – Fix by user
110 – Fix by DVB Receiver
111 – Remotely entered
true heading 0.0 – 359.9
magnetic variation status
0x41h if magvar ready (calculated)
0x40h is magvar not ready
magnetic variation
reserved spare for time status
reserved spare for time data
reserved spare for date data
reserved spare for platform pitch/roll status
reserved spare for pitch data
reserved spare for roll data
ETX
Checksum
REM-37
-99.9 to 99.9
or blanks if magvar not ready
(westerly variation negative)
Remote Control Option