Table B-2. Type 2 Output Sentence Format - Garmin GTN 635 Installation Manual

Table B-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.
Field Byte
1
id 2-3
1
seq
1-5
wpt
1
2
lat 3
1
2
3
lon
4
mvar 1-2
Page B-4
Rev. C

Table B-2. Type 2 Output Sentence Format

Format
7 6 5 4 3 2 1 0
x l a n n n n n
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 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
Description
ASCII character 'w' (77 hex)
Two ASCII numeric characters representing
route sequence number of waypoint (01 to 31)
x - undefined
l - 1 if last waypoint in route
a - 1 if active to waypoint
nnnnn - route sequence number of waypoint
(unsigned binary)
Destination waypoint identifier (will be blank
filled on right if less than 5 characters in
identifier)
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)
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)
Two's complement binary in 16ths of degrees.
Easterly variation is positive. MSB output first.
GTN 625/635/650 TSO Installation Manual
190-01004-02