User's Manual

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A NMEA-0183 Output
94 SPSx80 and SPSx81 Smart GPS Antennas User Guide
ROT Rate and Direction of Turn
The ROT string is shown below, and Ta bl e A.14 describes the message fields.
$GPROT,35.6,A*4E
Table A.14 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 *