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Glossary
Version 1.5
Operator's Manual
LED
Light Emitting Diode.
LEG
One of the segments in a route.
LEEWAY
The leeward drift of the vessel from the true course due to wind.
LOCAL TIME ZONE
The time zone (see TIME ZONE) in which the navigator is located.
LOCAL TIME ZONE OFFSET
The number of hours by which the local time zone differs from
Universal Time Coordinated.
LORAN-C TIME DIFFERENCES (TDs)
The phantom Loran-C Time Differences used in the navigator are
based on mathematical models. Local deviations in propagation
speed and Additional Secondary Factors (ASF) are not included in
the algorithm. The calculated positions may therefore differ from
positions obtained when using a dedicated Loran-C receiver by
several hundred meters.
MAGNETIC DEVIATION
The error introduced into the steering compass reading by nearby
ferrous metal mass distorting the earth magnetic flux field surround-
ing the compass.
MAGNETIC HEADING
Direction, as sensed by the steering compass, in relation to mag-
netic north.
MAGNETICNORTH
Direction in the plane of the observer's horizon toward the earth's·
north magnetic pole.
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