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-8.3-
Description of Sentences
Note: Checksum for RMA, RMB and RMC is mandatory. Checksum for other sentences is
evaluated if it exists. If there is no checksum, data is treated as valid data.
BWC - Bearing and distance to waypoint
BWR - Bearing and distance to waypoint - rhumb line
Time (UTC) and distance and bearing to, and location of, a specified waypoint from present
position. $--BWR data is calculated along the rhumb line from present position rather than along
the great circle path.
$--BWC, hhmmss.ss, llll.ll, a yyyyy.yy, a, x.x, T, x.x, M, x.x, N, c--c, a*hh<CR><LF>
$--BWC, hhmmss.ss, llll.ll, a yyyyy.yy, a, x.x, T, x.x, M, x.x, N, c--c, a*hh<CR><LF>
Checksum
Mode indicator
(see note 1)
Waypoint ID*
Distance, nautical miles
Bearing, degrees true
Waypoint longitude, E/W*
Bearing, degrees magnetic*
Waypoint latitude, N/S*
UTC of observation*
NOTE 1: Positioning system Mode indicator:
A= Autonomous mode
D= Differential mode
E= Estimated (dead reckoning) mode
M= Manual input mode
S= Simulator mode
N= Data not valid
The Mode indicator field shall not be a null field.
*: Not used