190-01182-02 GTR 225/GNC 255 TSO Installation Manual
Rev. F Page B-2
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.
Table B-1 Aviation Output Sentence Format
Note:
[1] The altitude is not output if the RS-232 port is configured as “Aviation Output 2.”
Ident (1 byte)
Data (10 bytes)
1 2 3 4 5 6 7 8 9 0
Description
z a a a a a Current GPS altitude in feet [1]
A s d d m m h h
Current latitude, where:
s - N (north) or S (south)
dd - degrees
mm - minutes
hh - hundredths of minutes
B s d d d m m h h
Current longitude, where:
s - E (east) or W (west)
ddd - degrees
mm - minutes
hh - hundredths of minutes
C d d d Track in whole degrees
D s s s Ground speed in knots
E d d d d d Distance to waypoint in tenths of nautical miles
G s n n n n
Cross track error, where:
s - L (left) or R (right) of course
nnnn - error in hundredths of nautical miles
I d d d d Desired track in tenths of degrees
K c c c c c
Destination waypoint identifier (will be blank filled on right if
less than 5 characters in identifier)
L d d d d Bearing to destination waypoint in tenths of degrees
Q s d d d
Magnetic variation, where:
s - E (east) or W (west)
ddd - tenths of degrees
S - - - - f
NAV valid flag status, where:
f - N (NAV flagged) or - (NAV valid)
T - - - - - - - - -
Warnings status, only data transmitted are dashes (-). Used
to indicate end of Type 1 sentences.
l (lower case Lima) d d d d d d Distance to destination waypoint in tenths of nautical miles.
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