Furuno FR-2105-B - Manual (Page 156)

-9.7-
RMC - Recommended specific GPS/TRANSIT data
Time, date, position, course and speed data provided by a GPS or TRANSIT navigation receiver.
Checksum is mandatory in this sentence. This sentence is transmitted at intervals not exceeding 2 s and is
always accompanied by RMB when a destination waypoint is active. RMC and RMB are the recommended
minimum data to be provided by a GPS or TRANSIT receiver. All data fields must be provided, null fields
used only when data is temporarily unavailable.
Checksum, mandatory for RMC
Magnetic variation (000.0 - 180.0 ° ), degrees E/W *2
Date: dd/mm/yy *2
Course over ground, degrees*2
$--RMC, hhmmss.ss, A, 1111.11, a, yyyyy.yy, a, x.x, x.x, xxxxxx, x.x, a,a*hh
Mode indicator (See note on page
9.3.) *1
Speed over ground, knots*2
Longitude, E/W
Latitude, N/S
Receive status (V = navigation receiver warning)
UTC of position fix *2
*1: Eidition 2 only, *2: Not used
RTE - Routes
Waypoint identifiers, listed in order with starting waypoint first, for the identified route. Two modes of
transmission are provided: “c” indicates that the complete list of waypoints in the route is being transmitted;
“w” indicates a working route where the first listed waypoint is always the last waypoint that had been
reached (FROM), while the second listed waypoint is always the waypoint that the vessel is currently
heading for (TO), the remaining list of waypoints represents the remainder of the route.
$--RTE, x.x, x.x, a, c--c, c--c, ...... c--c*hh
Checksum
Waypoint “n” identifier
Waypoint “1” identifier
Route identifier
Message mode (C = complete route, W = working route)
Message number
Total number of messages being transmitted