Garmin GPS 89 - Manual (Page 6)

The GPS 89 is a powerful navigation tool that can guide you any­
where in the world. To better undeistand its operation and apabili-
ties, it tnay be helpful to review the basic terms and concepts biiefly
explained below.
Other navigation and GPS definitions used in the manual are
defined in the appropriate teference sections of the manual.
Ahaanac Data
Sateiliie cdnsteliaticm Infarmaticin (induding
iocatkm and health of sateliites) that is tt<tn^
muted to your tectivtr from every GPS satel-
itte. Almanac data must be acquired before
GFS navigation can begin.
Bearing
The compass direction from your posUion to
a destination.
Onne Hade Good (CMC)
The bearing from the 'active from’ posUlon
(your starting point) to your present position.
OosMtadt Error (XTE)
The distance you are olf a desired course in
either direction.
Dtrired'tadtOn'K)
The compass course between the active
from’ and 'active to’ waypoints.
Differentinl GPS (DCFS)
An extension d the CPS system that uses
tand-based radio beacons to transmit position
corrections to GPS receivers.
Esdmated Time of Arrival (EEA)
The time of day of your arrival at a destina­
tion.
Estimated Time Enronte (ETE)
The time left loynur destination at your pre­
sent speed.
Grid
Coordinate system that projects the eatth on
a flat sur&ce, using square zones for position
measurements. UTM/UPS and Maidenhead
formats ate grid systems.
Groond Speed
The velocity you are traveling relative to a
ground position.
Lalitiide
The nonh/south measurement of position
perpendtculano the eanhb polar axis.
An easl/west measuremcru of posUion in
lebtion CO the Prime Meridian, an imaginaty
circle diat passes through the north and south
poles.
NarigntkiD
The process of travelling from one place to
another and knowing where you ate in relation
to your desired course.
PoshitMl
An exact, unique locatimi based on a gco-
grajfiic cooidnutc system.
Tradì (TRK)
The direction of movemem relative to a
grourid position.
Vuvenal Ttamsvtne Meratutr (UTM)
A grid cooidinate system that projects glob­
al Seatons onto a flat surftice to measure posi­
tion in specific zones-
’Vdodty Made Good (VMG)
The speed you ate traveling in the direction
of the destination.
tAhypoiint
A spedile location saved in ihe reoeiverh
memory.