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Glossary
Version 7.5
Operator's Manual
mLTER
TI~.1E
If the GPS signals are distorted by Selective Availability (S/A) the
COG and SOG readings will be unstable, especially at low speeds.
In order to smooth out the readings you can adjust the COG/SOG
filter time (CFG 1, COG SOG)
FLUX GATE COMPASS
A magnetic compass sensor without needle or card, whose two- or
three-phase sinusoidal output is a heading reference. Interfaced to
the navigator via the NMEA interface.
FM·
Frequency Modulation - The method by which a signal offsets
the frequency in order to modulate it on a data link.
FORCE HEALTHY
A feature ofthe navigator that permits the user to override the data
flag in the almanac that tells the navigator that the quality of the
data from a satellite is inadequate for navigation. This feature
should be used only with the greatest care.
FORCE UNHEALTHY
A feature of the navigator that permits the operator to inhibit a
satellite position update even though the quality of the data from
thatsatellite apparently is acceptable.
FUNCfION
A specific operational capability ofthe navigator.
FUNCTION KEY
A key on the front panel of the navigator that selects a specific
function.
GEODETIC
Associated with the science ofGeodesy, which includes the means
ofdetermining absolute position with uniform accuracy at all points
on the Earth's surface.
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