Navigation Terms - Garmin GNC 420(A) Pilot's Manual & Reference

13.3 NAVIGATION TERMS

The following navigation terms are used on the GNC 420 and in this Pilot' s Guide. Refer to Figures 13-1 and 13-2
for graphic representation of navigation terms.
NORTH
WPT 1
Figure 13-1 Illustrated NAV Terms
Term
ALT (altitude) Height above mean sea level (MSL).
BRG (bearing)
The compass direction from the present position to a destination waypoint.
CAS (calibrated
Indicated airspeed corrected for instrument errors.
airspeed)
The recommended direction to steer in order to reduce course error or stay on course. Provides
CTS (course to steer)
the most efficient heading to get back to the desired course and proceed along the flight plan.
CUM (cumulative) The total of all legs in a flight plan (cumulative distance).
DIS (distance)
The "great circle" distance from the present position to a destination waypoint.
DOP (dilution of A measure of satellite geometry quality on a scale of one to ten (lowest numbers are best,
precision) highest numbers are worst).
DTK (desired track) The desired course between the active "from" and "to" waypoints.
190-00140-20 Rev. K
WPT 2
CURRENT ALTITUDE
AND POSITION
Figure 13-2 Illustrated Vertical NAV Terms
Description
GNC 420(A) Pilot's Guide and Reference
SECTION 13 – MESSAGES,
ABBREVIATIONS, & NAV TERMS
TIME AND DISTANCE
TO PROFILE
DISTANCE TO TARGET
TARGET ALTITUDE
AND POSITION
AIRPORT
13-11