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Glossary
longitude
Loran-C
loran chain
loran receiver
magnetic variation
master station
meter
nav aid
Page G-4
Used in conjunction with the North/South lines of longitude to
determine position.
LCD
Liquid Crystal Display.
leg
The path between adjacent waypoints of a route. Also known
as a segment of a route or trip.
Imaginary lines on the Earth's surface running North/South
and expressed in degrees (0-180) east or west of the Prime
Meridian (a line running from the North to South Pole, passing
through Greenwich, England).
LOng RAnge Navigation. The Loran-C Radionavigation System
comprises a series of land-based radio transmitters emitting
precisely-timed pulses, which are received and translated into
position fixes by a loran receiver. The 961 converts and dis-
plays its GPS coordinates into Loran-C position measurements,
or TDs.
A group of loran transmitters comprised of a master station
and at least two secondary stations.
An electronic position-finding device that receives pulses from
loran stations.
The difference between magnetic North and true North. In the
continental U.S., this varies from more than 20
Maine) to more than 20
the difference varies according to geographic location, the
Northstar 961 automatically calculates magnetic variation, and
uses it to display bearings as magnetic north. The variation at
any location changes slowly over a period of years, and the
961 compensates, according to the current calendar year.
The one loran transmitter in a chain of at least three stations.
The master station initiates the series of coded pulses emu-
lated by the secondary transmitters.
A unit of measurement (length) equal to 39.37 inches, slightly
more than a standard yard.
Aids to navigation often used on coastal and inland waters.
Buoys, lighthouses, and daymarkers are nav aids.
°
east (in Washington state). Because
961 Operations and Reference Manual Rev. D
°
west (in
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