NAVIS NavDP 4000. Operation Manual
Appendix D
Sensors and Ref-Systems Raw Data
D.1
Sensors Raw Data
NAVIS NavDP 4000
receives data from sensors using RS-232/RS-422 interfaces. Following protocols are used:
Compasses
Type
Data
Comments
GYRO
Heading, ROT
The system receives HDT or THS mes-
sage.ROT message is an option.
Magnetic Compass
Heading, Deviation
The system receives HDT, HDG or HDM
message
HDT Message: Heading — True
The message format:
$--HDT,x.x,T*hh
where:
x.x
— Heading Degrees
T
— True
hh
— Checksum
Example
$HEHDT,316.70,T*1C
ROT Message: Rate of Turn
The message format:
$--ROT,x.x,A*hh
where:
x.x
— Rate of turn, deg/min. “–” — bow turns to port
A
— Status. A = Data Valid, V = Data invalid
hh
— Checksum
Example
$HEROT,060.1,A*2C
277
Doc. 000.JDP-10000-OME, rev.3.3.13/“2102.$–17A-Advanced”
