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Magellan GPS 320 User Manual

Page 72

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Magellan GPS 315/GPS 320

LMK

Landmark. A location saved in the unit’s
memory which is obtained by entering data,
editing data, calculating data or saving a
current position. Used to create routes. Same
as a waypoint.

Longitude

The angular distance east or west of the prime
meridian (Greenwich Meridian) as measured
by lines perpendicular to the parallels and
converging at the poles from 0˚to 180˚.

Magnetic North

The direction relative to a magnetic compass

NMEA

National Marine Electronics Association. A

professional organization that defines and

maintains the standard serial format used by

marine electronic navigation equipment and

computer interfaces.

OSGB

A coordinate system describing only Great

Britain, similar to UTMs. Used with GRB36

datum.

Position fix

Position coordinates as computed by the GPS

receiver.

SOG

Speed Over Ground. The speed at which the

receiver is moving.

TRN

Turn. Degrees or direction to turn.

True North

The direction to North Pole from an

observer’s position. The north direction on

any geographical meridian.

TTG

Time To Go. The measurement of how long

it will take you to arrive at your destination.

TTG is based on how fast you are moving

towards the destination and the distance

remaining.