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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.
Position:
Latitude and longitude, and altitude.
Appendices
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