Airmar NMEA 2000® Depth, Датчики - Manual (Page 24)

DST200 User Manual revision 1.000
Proprietary and Confidential
22
To change the Speed of Sound used for depth calculations (field 5), use the Command Group Function PGN 126208, specifying the individual fields in PGN 126720-40 as follows.
PGN 126720
Field Value
1 135 (decimal)
3 4 (decimal)
4 40 (decimal)
5 Desired Speed of Sound value.
If a Command Group Function PGN 126208 is received to change field 5 to a value outside the range of allowable values, the response will be an Acknowledge Group Function
PGN 126208 with a parameter error code indicating 'Request or command group parameter out-of-range.'