Furuno FS-1570 - Manual (Page 197)

APPENDIX
AP-19
RMA - Recommended minimum specific LORAN-C data
$--RMA,A,llll.lll,a,yyyyy.yy,a,x.x,x.x,x.x,x.x,x.x,a,a*hh
| | | | | | | | | | | | |
| | | | | | | | | | | | +------- 10
| | | | | | | | | | | +--------- 9
| | | | | | | | | +---+----------- 8
| | | | | | | | +------------------ 7
| | | | | | | +---------------------- 6
| | | | | | +-------------------------- 5
| | | | | +------------------------------ 4
| | | +----+--------------------------------- 3
| +---+-------------------------------------------- 2
+------------------------------------------------------- 1
1. Status: A=data valid, V=blink, cycle or SNR warning
2. Latitude, degrees N/S
3. Longitude, degrees E/W
4. Time difference A, microseconds
5. Time difference B, microseconds
6. Speed over ground, knots
7. Course over ground, degrees true
8. Magnetic variation(see note 1),degree E/W
9. Mode indicator(see note 2)
10. Checksum
NOTE 1 - Easterly variation(E) subtracts from true course
Westerly variation(W) adds to true course
NOTE 2 Positioning system Mode indicator:
A = Autonomous
D = Differential
E = Estimated (dead reckoning)
M = Manual input
S = Simulator
N = Data not valid
The Mode indicator field supplements the Status field. The Status field
shall be set to V=invalid for all values of Operating Mode except for
A=Autonomous and D=Differential. The positioning system Mode indicator
and Status field shall not be null fields.