Garmin GNS 430 - Manual (Page 185)

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WPT 1
XTK
NORTH
WPT 2
BRG
GS
DIS
AIRPLANE
DTK
TRK
Navigation Terms
The following navigation terms are used
on the GNS 430 and in this Pilot’s Guide:
ALT(altitude) —Height above mean sea
level (MSL).
BRG(bearing) —The compass direction
from your present position to a destination
waypoint.
CAS(calibrated airspeed) —Indicated air-
speed corrected for instrument errors.
CTS(course to steer) —The recommended
direction to steer in order to reduce course
error or stay on course. Provides the most
11 MESSAGES,
aBBREVIATIONS
& nav tERMS
efficient heading to get back to the desired
course and proceed along your flight plan.
CUM(cumulative) —The total of all legs in
a flight plan (such as “cumulative distance”).
DIS(distance) —The “great circle” distance
from your present position to a destination
waypoint.
DOP(dilution of precision) —A measure
of satellite geometry quality on a scale of one
to ten (lowest numbers are best, highest num-
bers are worst).
DTK(desired track) —The desired course
between the active “from” and “to” way-
points.
EFF(efficiency) —A measure of fuel con-
sumption, expressed in distance per fuel units
(e.g., nautical miles per gallon).
ENDUR(endurance) —Flight endurance,
or total available flight time based upon avail-
able fuel.
EPE(estimated position error) —A
measure of satellite geometry quality and
additional factors, expressed as a horizontal
position error in feet or meters.
ESA(en route safe altitude) —The recom-
mended minimum altitude within ten miles,
left or right, of your desired course on an
active flight plan or direct-to.
ETA(estimate time of arrival) —The
estimated time at which you will reach your
destination waypoint, based upon current
speed and track.
ETE(estimated time en route) —The time
it will take to reach the destination waypoint,
from present position, based upon current
ground speed.
FF(fuel flow) —The fuel flow rate,
expressed in fuel units per time
(e.g., gallons per hour).
FOB(fuel on board) —The total amount of
usable fuel on board the aircraft.
GS(ground speed) —The velocity you are
travelling relative to a ground position.
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