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Altitude:
Distance above mean sea level.
BRG:
The compass direction from current position to next waypoint
or the destination.
COG:
Course over ground. Your direction of movement relative to a
ground position.
Coordinate:
A set of numbers that describes your location on or
above the earth.
Course:
GPS uses “Course” to define the movement direction of
receiver on the globe surface instead of navigation direction.
Datum:
A math model designed to fit part of the earth’s surface.
Latitude and longitude lines on a paper map are referenced to a
specific map datum. The map datum for a GPS receiver needs to match
the datum listed on the corresponding paper map.
Distance:
The linear length from current position to named
waypoint or between two waypoints along a route.
DTD:
Distance to Destination
DTW:
Distance to the next Waypoint
Goto:
A single leg route with the present position being the
start of the route and a defined waypoint as the destination. You can
use this function when you want to go directly to one of the waypoints
saved in the memory. Select “Go to”, and then find out the waypoint
you want. Confirm your selection and it starts navigation in this mode.
Latitude:
The angular distance north or south of the equator
measured by lines encircling the earth parallel to the equator in degrees
from 0
°
to 90
°
.
Leg:
A segment of a route that has a staring (From)
waypoint and a destination(To) waypoint. A route may consist of one
or more legs. For example, a route from Waypoint A to Waypoint B, to
Waypoint C and to Waypoint D, has totally three legs from A to B, and
from B to C, and from C to D.
Longitude:
The angular distance east or west of the prime meridian
(Greenwich meridian) as measured by lines perpendicular to thee
parallels and converging at the poles from 0
°
to 180
°
.
Parallel Channel Receiver:
A continuous tracking receiver using
multiple receiver circuits to track satellites simultaneously
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