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A     NMEA-0183 Output

88     SPSx80 Smart GPS Antenna User Guide

The ROT string is shown below, and Table A.14 describes the message fields.

$GPROT,35.6,A*4E

Table A.14

ROT message fields

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 *