Table B-1. Type 1 Output Sentence Format - Garmin GTN 635 Installation Manual

Table B-1 describes the Type 1 output sentence item designator (id) and item data (dddd) fields. If data
for these sentences is invalid or unavailable, dashes ("-") are used to fill in all non-blank character
positions.
Ident (1 byte)
1 2 3 4 5 6 7 8 9 0
a a a a a
z
s
A
s
B
d d d
C
s s s
D
d d d d d
E
s n n n n
G
d d d d
I
c c c c c
K
d d d d
L
s d d d
Q
- - - - f
S
- - - - - - - - -
T
d d d d d d
l (lower case
Lima)
* The altitude is not output if the RS-232 port is configured as ―Aviation Output 2.‖
* The line feed character is not output if the RS-232 port is configured as ―Aviation Output 2.‖
Page B-2
Rev. C

Table B-1. Type 1 Output Sentence Format

Data (10 bytes)
d d m m h h
d d d m m h h
Description
Current GPS altitude in feet *
Current latitude, where:
s - N (north) or S (south)
dd - degrees
mm - minutes
hh - hundredths of minutes
Current longitude, where:
s - E (east) or W (west)
ddd - degrees
mm - minutes
hh - hundredths of minutes
Track in whole degrees
Ground speed in knots
Distance to waypoint in tenths of nautical miles
Cross track error, where:
s - L (left) or R (right) of course
nnnn - error in hundredths of nautical miles
Desired track in tenths of degrees
Destination waypoint identifier (will be blank filled
on right if less than 5 characters in identifier)
Bearing to destination waypoint in tenths of
degrees
Magnetic variation, where:
s - E (east) or W (west)
ddd - tenths of degrees
NAV valid flag status, where:
f - N (NAV flagged) or - (NAV valid)
Warnings status, only data transmitted are dashes
(-). Used to indicate end of Type 1 sentences.
Distance to destination waypoint in tenths of
nautical miles.
GTN 625/635/650 TSO Installation Manual
190-01004-02