Jeppesen Nobeltec SSHS, Руководство пользователя

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Solid State Heading Sensor (SSHS) Owner’s Manual
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2:
Rate of Turn – This field is used to report the vessel’s rate of turn.
3:
Reserved – This field is reserved by NMEA; therefore, the SSHS sets all bits to a logic
1.
PGN 127257 – Attitude
The SSHS uses this PGN to indicate the vessel’s attitude (pitch and roll). The Yaw (field 2) is
not used, therefore, this field always contains 0x7FFF (data not available).
Field 1:
SID – The sequence identifier field is used to tie related PGNs together. For example,
the SSHS will transmit identical SIDs for Vessel Heading (PGN 127250), Attitude
(127257), and Rate of Turn (127251) to indicate that the readings are linked together
(i.e., the data from each PGN was taken at the same time although they are reported
at slightly different times).
2:
Yaw – This field always contains a value of 0x7FFF (data not available).
3:
Pitch – This field is used to report the vessel’s pitch.
4:
Roll – This field is used to report the vessel’s roll.
5:
Reserved – This field is reserved by NMEA; therefore, the SSHS sets all bits to a logic
1.
PGN 127258 – Magnetic Variation
The SSHS may or may not periodically transmit this PGN depending on whether or not it has
been programmed with the local magnetic variation. Programming the magnetic variation
(through a Nobeltec display product like the DSM200) will cause the SSHS to transmit this
PGN once per second. If the local magnetic variation is not known, then the variation can be
disabled (again, through a display product like the DSM200) at which time the SSHS will
cease to transmit this PGN.
Field 1:
SID – The sequence identifier field is used to tie related PGNs together. For example,
the SSHS will transmit identical SIDs for Vessel Heading (PGN 127250), Attitude
(127257), and Rate of Turn (127251) to indicate that the readings are linked together
(i.e., the data from each PGN was taken at the same time although they are reported
at slightly different times).
2:
Variation Source – This field always contains a value of 0x00 (manual entry).
3:
Reserved – This field is reserved by NMEA; therefore, the SSHS sets all bits to a logic
1.
4:
Age of Service – This field always contains a value of 0x7FFF (data not available).
5:
Variation – This field is used to report the local magnetic variation as entered by the
user. Positive values are Easterly and negative values are Westerly.