Jeppesen Nobeltec SSHS, Owner'S Manual

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Solid State Heading Sensor (SSHS) Owner’s Manual
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sentence works in collaboration with the reception of an RMC or VTG sentence to produce
true heading.
$IIHDT,A,B*hh<CR><LF>
Field A
: Null unless receiving variation from RMC and VTG in which case magnetic heading
including deviation and variation in tenths of degrees
B
: This field always contains a “T” indicating true magnetic heading
ROT – Rate of Turn
The SSHS indicates the vessel’s rate of turn 5 times a second.
$IIROT,A,B*hh<CR><LF>
Field A
: Rate of turn in degrees/minute where “-“ indicates the bow turning to port
B
: This field indicates whether data is valid, an “A” indicates that the data is valid where
a “V” indicates invalid data
MAROUT – Manufacturer’s Proprietary Output Sentence
Since there is no standard NMEA 0183 sentence for indicating the vessel’s attitude (pitch and
roll), the SSHS uses a proprietary sentence to indicate pitch and roll one time per second.
$PMAROUT,A,B,C,D,E,F,G,H,I*hh<CR><LF>
Field A
: Always reads “ATT” to indicate following data is associated with the vessel’s attitude
B
: Roll angle in tenths of degrees, where “-“ indicates roll to the port
C
: Pitch angle in tenths of degrees, where “-“ indicates bow pitches downward
D-I
: Null
Message
Identifier Text String Description
01
Deviation
Calibration
Started
This message is transmitted at the beginning of the
magnetic
deviation calibration process.
02
Deviation Calibration
Completed
Successfully This message is transmitted upon successful completion
of the magnetic deviation calibration process (i.e., a new
deviation table has been stored in permanent memory).