Furuno DD-80 - Manual (Page 99)

C-7
GNS: GNSS fix data
RMB: Recommended minimum navigation information. Cross-track error,
direction to steer, origin and destination waypoint latitude and longitude,
range and bearing of destination waypoint, destination closing velocity,
arrival alarm.
RMC: Recommended minimum specific GPS/TRANSIT data. UTC of
position fix, latitude and longitude, ground speed and course, data,
magnetic variation
RTE: Routes
VTG: Course over ground and ground speed
WCV: Waypoint closure velocity
WNC: Distance-waypoint to waypoint-great circle
WPL: Waypoint location
XTE: Cross-track error, measured
ZDA: Time and data
ZTG: UTC and time to destination waypoint
Also, the following NMEA 0183 Ver. 1.5 sentences are output
APA: Autopilot sentence “A”. Magnitude of cross-track error, direction to
steer, arrival alarm, bearing origin to destination.
WNR: Distance-waypoint to waypoint-rhumb line
Input data sentence of NMEA 0183 Ver. 1.5/2.0
Checksum is checked if attached, and if any error is found, the sentence
becomes invalid. Talker ID is not distinguished.
DBT: Depth below transducer
$--DBT, 1234.5 f, 1234.5, M, 1234.5
F*12
a b c d e f g
a, b: Water depth, feet
c, d: Water depth, m
e, f: Water depth, fathoms
g: Checksum
DPT: Depth
$--DPT, 1234.5 1234.5, 1234.5*23,
a b c
a: Water depth relative to the transducer, meters
b: Offset from transducer, meters… not used
c: Checksum
MTW: Water temperature
$--MTW, 23.4, C*34
a b c
a: Temperature: degrees, C
c: Checksum