Garmin GNC 420AW, Installation Manual

Page: 154 / 236

Page D-4 400W Series Installation Manual
Rev. G 190-00356-02
Table D-2 describes the Type 2 output sentence item designator (id), sequence number (seq), waypoint
identifier (wpt), waypoint latitude (lat), waypoint longitude (lon), and magnetic variation at waypoint
(mvar) fields.
Table D-2. Type 2 Output Sentence Format
Field Byte Format
7 6 5 4 3 2 1 0
Description
id
1
2-3
ASCII character 'w' (77 hex)
Two ASCII numeric characters representing route
sequence number of waypoint (01 to 31)
seq
1 x l a n n n n n x - undefined
l - 1 if last waypoint in route
a - 1 if active to waypoint
nnnnn - route sequence number of waypoint
(unsigned binary)
wpt 1-5 Destination waypoint identifier (will be blank filled on
right if less than 5 characters in identifier)
lat 1
2
3
s d d d d d d d
x x m m m m m m
x h h h h h h h
s - 0 (north) or 1 (south)
ddddddd - latitude degrees (unsigned binary)
xx - undefined
mmmmmm - latitude minutes (unsigned binary)
x - undefined
hhhhhhh - hundredths of latitude minutes
(unsigned binary)
lon 1
2
3
4
s x x x x x x x
d d d d d d d d
x x m m m m m m
x h h h h h h h
s - 0 (east) or 1 (west)
xxxxxxx - undefined
dddddddd - longitude degrees (unsigned binary)
xx - undefined
mmmmmm - latitude minutes (unsigned binary)
x - undefined
hhhhhhh - hundredths of latitude minutes
(unsigned binary)
mvar 1-2 Two's complement binary in 16ths of degrees.
Easterly variation is positive. MSB output first.