200
Version 2.0
Operator’s Manual
Glossary
EDIT MODE
The state in the navigator where it is possible to enter or change
data. EDIT MODE is accessed by pressing the
E
-key. Press the
E
-
key once more to ENTER the data into the memory and leave EDIT
MODE.
ELEVATION ANGLE
The angle made by the line-of-sight range to the satellite and the
horizontal plane of the navigator antenna. Thus, the elevation
angle is 90 degrees when the satellite is overhead and 0 degrees
when it first appears on the horizon. Satellites whose maximum
elevation angle is less than 5 degrees are not good candidates for
providing an accurate position (latitude and longitude) update.
ELLIPSOID
A spheroid whose north-south axis is shorter than the east-west
axis (oblate spheroid).
ENTER
To store data in the memory of the navigator.
EPHEMERIDES (Singular: EPHEMERIS)
Tabulations of accurate data describing celestial position and
health of the satellites over a 24-hour period. The data is uploaded
to the satellites every 12 hours.
ETA
Estimated Time of Arrival. Calculated on basis of the distance to
the destination and the current (or estimated) speed.
FATDMA
Fixed Access Time Division Multiple Access – Data link access
protocol used by base station transponders to allocate transmis-
sion slots on the data link. These slots are fixed and will thus not
change until the base station transponder is re-configured.
FILTER TIME
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
Summary of Contents for MX420
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Page 181: ...168 Version 2 0 Operator s Manual Automatic Identifaction System ...
Page 183: ...170 Version 2 0 Operator s Manual Datum List ...
Page 231: ...Place Stamp Here ADivision of NAVICO Inc 23868 Hawthorne Blvd Suite 201 Torrance CA 90505 USA ...
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