NMEA-0183 message: ROT

Rate and direction of turn

NOTE – The heading computation in this message is derived from consecutive positions. For heading using a moving baseline system, see NMEA-0183 message: PTNL,AVR.

An example of the ROT string is:

$GPROT,35.6,A*4E

ROT message fields

Field Meaning
0 Message ID $GPROT
1 Rate of turn, degrees/minutes, “–” indicates bow turns to port
2 A: Valid data
V: Invalid data
3 The checksum data, always begins with *