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-9.8-
VDR - Set and drift
The direction towards which a current flows (set) and speed (drift) of current.
$--VDR, x.x, T, x.x, M, x.x, N *hh<CR><LF>
Checksum
Current speed, knots
Direction, degrees magnetic *1
Direction, degrees true
*1: Not used
WPL - Waypoint location
Latitude and longitude of specified waypoint
$--WPL, 1111.11, a, yyyyy.yy, a, c--c*hh<CR><LF>
Checksum
Waypoint number
Waypoint longitude, E/W
Waypoint latitude, N/S
ZDA - Time and date
UTC, day, month, year and local time zone.
$--ZDA, hhmmss.ss, xx, xx, xxxx, xx, xx*hh<CR><LF>
Checksum
Local zone description, minutes *1
Local zone description, hours *1
Year
Month, 01 to 12
Day, 01 to 31
UTC
*1: Not used
VTG – Course over ground and ground speed (R-type only)
The actual course and speed relative to the ground.
$--VTG, x.x, T, x.x, M, x.x, N, x.x, K,a *hh<CR><LF>
Mode indicator (See note on page 9.3.) *1
Speed over ground, km/h
Speed over ground, knots
Course over ground, degrees magnetic
Course over ground, degrees true
*1: Eidition 2 only