Marine Systems
Aviation Recorders
Page 1–21
Initial Issue
165M0601-00
Feb. 01/05
1.5.1.5
GNS - GNSS Fix Data
If the Mode Indicator is a NULL field, the sentence is ignored.
Field
Notes
UTC of Position
UTC Second is used to
indicate Time Stamp
Latitude (2 fields)
Used
Longitude (2 fields)
Used
Mode Indicator
Used
Total Number of Satellites in Use
Ignored
HDOP
Ignored
Antenna Altitude
Ignored
Geoidal Separation
Ignored
Age of Diff Data
Ignored
Diff Reference Station ID
Ignored
1.5.1.6
HDT - Heading True
Message is ignored if Talker is “HC”.
Field
Notes
Heading
Used if Valid indicator is “T”
Valid Indicator
Used
1.5.1.7
RMC - Recommended Minimum Specific GNSS Data
Field
Notes
UTC of Position Fix
UTC Second is used to
indicate Time Stamp
Status
Must be “A”
Latitude (2 fields)
Used
Longitude (2 fields)
Used
SOG, knots
Used
COG, degrees
Used
Date
Ignored
Magnetic Variation (2 fields)
Ignored
Mode Indicator
Used