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Raw position fix
After smoothing
Speed(kt)
Time
Speed(degree)
Time
Raw position fix
After smoothing
Figure 5-13 GPS speed smoothing
GEODETIC: Select the geodetic chart system you are using.
WGS-84 (standard GPS chart system), can be directly selected.
For other charts, select OTHER and enter chart number referring
to Geodetic Chart List in the Appendix.
POS CALIB:Position calibration: You may apply an offset to po-
sition generated by the internal GPS receiver, to further refine po-
sition accuracy. The L/L position offset icon (L/L) appears on the
display.
UNHEALTH: Every GPS satellite is broadcasting abnormal sat-
ellite number(s) in the Almanac. Using this information, the GPS
receiver eliminates any malfunctioning satellite from the GPS sat-
ellite schedule. Once the malfunctioning satellite is returned to
on-line status it is automatically restored to the satellite schedule
when the Almanac is received. In some instances however the Al-
manac may not contain information which announces that a satel-
lite is now back on line. If you hear of this through another source,
you can manually restore the satellite to the satellite schedule. Con-
versely, you can manually disable a healthy satellite if you hear it
is unhealthy.
To restore or disable a satellite, select RSTR or DISABLED on the
UNHEALTH line and then enter satellite number.