Raytheon STD 21 GPS Operation Manual page 82

Satellite Compass
STD 21 GPS
The following alarm messages or errors may be indicated at the Operator Unit:
(to view details and remedies for each alarm message, see section 3.7)
A. "Accel. Error"
B. "Bow GPS Bit"
C. "Bow GPS Com."
D. "Data I/F #3 Error"
E. "Data I/F #4 Error"
F. "Gyro Triad Error"
G. "Heading Failure"
H. Heading receiver indicates erroneous heading
I. "IMU I/F Error"
J. "Init. Failure"
K. "No connection"
L. "No Data on Bus"
M. "Poor Sat. Signals"
N. "Stern GPS Bit"
O. "Stern GPS Com."
P. "Sync. Failure"
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Edition: Feb. 05, 2007
3717/110--850.DOC020002