Garmin GPS 400W, GNC 420W Installation Manual page 147

SHADIN "S" FORMAT
<STX>
SA012<CR><LF>
SB345<CR><LF>
SC678<CR><LF>
SD<+/->9012<CR><LF>
SE<+/->3456<CR><LF>
SF<+/->78<CR><LF>
SG<+/->90<CR><LF>
SH123<CR><LF>
SI456<CR><LF>
SJ<+/->78<CR><LF>
SK<+/->901<CR><LF>
SL234<CR><LF>
SM5678<CR><LF>
SN90123<CR><LF>
SO4567<CR><LF>
SP89012<CR><LF>
SQ345<CR><LF>
SR67890<CR><LF>
SS123<CR><LF>
ST456<CR>LF>
SU789012<CR><LF>
SV<E/W>345<CR><LF>
SW<N/S>67 8901<CR><LF>"SW" (ASCII character); "N" represents North, "S" represents South; "67 8910" represents current
SX<E/W>234 5678<CR><LF>"SX" (ASCII character); "E" represents East, "W" represents West; "234 5678" represents
SY<L/R>90<CR><LF>
Sa<+/->1234<CR><LF>
Sb56.78<CR><LF>
S*901<CR><LF>
<ETX>
Where:
<STX> start-transmit character (0x02)
<CR> carriage-return character (0x0d)
<LF> line-feed character (0x0a)
<+/-> sign indicator (0x2b["+"] or 0x2d["-"])
<ETX> end-transmit character (0x03)
Note: Checksum is calculated by adding each byte in the message (including all characters from <STX>
up to and including the error log/reason indicator), such that carries are discarded to give a one byte
result. The ASCII-coded decimal representation of that byte is given, ranging from 0 (0x30, 0x30, 0x30)
to 255 (0x32, 0x35, 0x35).
400W Series Installation Manual
190-00356-02
"SA" (ASCII characters); "012" represents indicated Air Speed (knots)
"SB" (ASCII characters); "345" represents true Air Speed (knots)
"SC" (ASCII characters); "678" represents Mach Speed (thousandths)
"SD" (ASCII characters); sign; "9012" represents pressure altitude (tens of feet)
"SE" (ASCII characters); sign; "3456" represents density altitude (tens of feet)
"SF" (ASCII characters); sign; "78" represents outside air temperature (Celsius)
"SG" (ASCII characters); sign; "90" represents true air temperature (Celsius)
"SH" (ASCII characters); "123" represents wind direction (degrees from north)
"SI" (ASCII characters); "456" represents wind speed (knots)
"SJ" (ASCII characters); sign; "78" represents rate of turn (degrees per second)
"SK" (ASCII characters); sign; "901" represents vertical speed (tens of ft/minute)
"SL" (ASCII characters); "234" represents heading (degrees from north)
"SM" (ASCII characters); "5678" represents fuel flow, right (tenths gallons/hour)
"SN" (ASCII characters); "90123" represents fuel used, right (tenths gallons)
"SO" (ASCII characters); "4567" represents fuel flow, left (tenths gallons/hour)
"SP" (ASCII characters); "89012" represents fuel used, left (tenths gallons)
"SQ" (ASCII characters); "345" represents error log/reason indicator
"SR" (ASCII characters); "67890" represents fuel remaining (tenths gallons)
"SS" (ASCII character); "123" represents ground speed (knots)
"ST" (ASCII character); "456" represents track (degrees)
"SU" (ASCII character); "789012" represents distance to waypoint (hundredths nautical miles)
"SV" (ASCII character); "E" represents East, "W" represents West; "345" represents magnetic
variation (tenths degrees)
latitude (degrees, minutes, hundredths of minutes)
current longitude (degrees, minutes, hundredths of minutes)
"SY" (ASCII character); "L" represents Left, "R" represents Right; "90" represents drift angle
(degrees)
"Sa" (ASCII character); sign; "1234" represents barometric corrected altitude (tens of feet)
"Sb" (ASCII character); "56.78" represents current barometric pressure setting (inches Hg)
"S*" (ASCII character); "901" represents checksum
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