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Glossary
LEG
LEEWAY
LOCAL TIME ZONE
LOCAL TIME ZONE OFFSET
LORAN-C TIME DIFFERENCES (TDs)
MAGNETIC DEVIATION
MAGNETIC HEADING
MAGNETIC NORTH
MAGNETIC VARIATION
Version 2.0
One of the segments in a route.
The leeward drift of the vessel from the true course due to wind.
The time zone (see TIME ZONE) in which the navigator is located.
The number of hours by which the local time zone differs from
Universal Time Coordinated.
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.
The error introduced into the steering compass reading by nearby
ferrous metal mass distorting the earth magnetic flux field surround-
ing the compass.
Direction, as sensed by the steering compass, in relation to mag-
netic north.
Direction in the plane of the observer's horizon toward the earth's
north magnetic pole.
The angle by which magnetic north varies from true north at any
given point on the earth's surface. This value is automatically
added to the magnetic heading input to provide true heading for
calculation and display purposes.
Operator's Manual
205
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