Instruction manual

Command Response Formats Page 97
Command
Example: $GPAPA,A,A,9.999,R,N,A,A,069,M,001
NMEA Bearing and Distance
$PASHS,NME,BWC
This command asks for the bearing and distance information. The structure is
$PASHS,NME,BWC,x
where x is the port to output the message.
$GPBWC
The response message displays bearing and distance. The structure is
$GPBWC,hh,mm,ss.ss,dd,mm.mmmm,d,dd,mm.mm,d,bbb.bb,ddd.ddd,ppp
where the fields are as described in Table 4.42.
eee.eee Cross-track error 0 through 999.999
s Sense L = left R = right
N Nautical miles
c Arrival circle A = valid V = invalid
A A for arrival perpendicular (crossing the line which is perpendicular to the
course line and which passes through the destination waypoint)
bbb Bearing to destination from origin 0 through 999
c Bearing M = magnetic T = true north
sss Destination waypoint identifier 3-character string
Table 4.42: BWC Structure
Field Description
hh UTC of bearing hours 0 through 23
mm UTC of bearing minutes 0 through 59
ss.ss UTC of bearing seconds 0 through 59.99
dd Latitude of waypoint degrees 0 through 90
mm.mmmm Latitude of waypoint minutes 0 through 59.9999
d Direction of latitude N= north S = south
dd Longitude of waypoint degrees 0 through 180
mm.mm Longitude of waypoint minutes 0 through 59.99
d Direction of longitude E = east W = West
bbb.bb True bearing (T for true) 0 through 999.99
Table 4.41: Autopilot APA Structure (continued)
FIeld Description (continued)