Furuno RD-50 Operator's Manual page 76

APPENDIX 4 DIGITAL INTERFACE
BWR - Bearing and distance to waypoint - rhumb line
$--BWR, hhmmss.ss, llll.lll, a, yyyyy.yyy, a, x.x, T, x.x, M, x.x, N, c--c, a*hh<CR><LF>
UTC of observation
Note: 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 shall not be a null field.
DBK - Depth below keel
$--DBK, x.x, f, x.x, M, x.x, F*<CR><LF>
Water depth, feet
DBS - Depth below surface
$--DBS, x.x, f, x.x, M, x.x, F*hh<CR><LF>
Water depth, feet
DBT - Depth below transducer
$ DBT, x.x, f, x.x, M, x.x, F*hh<CR><LF>
--
Water depth, feet
DPT - Depth
$ DPT, x.x, x.x, x.x*hh<CR><LF>
--
Offset from transducer, in meters
Water depth relative to trancsducer, in meters
AP-6
Waypoint longitude, E/W
Waypoint latitude, N/S
Water depth, fathoms
Water depth, m
Checksum
Water depth, fathoms
Water depth, m
Checksum
Water depth, fathoms
Water depth, m
Checksum
Maximum range scale in use
Mode indicator
(see Note)
Waypoint ID
Distance, nautical miles
Bearing, degrees magnetic
Bearing, degrees true
Checksum