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Time to Dest—The estimated time required to reach a GOTO destina-
tion, or the final waypoint in a route.
Time to Next—The estimated time required to reach a GOTO destina-
tion, or the next waypoint in a route.
Time to VNv—Prior to reaching the initial descent point, ‘Time to VNv’
indicates the time it will take to reach the initial Vertical Nav descent point.
After passing the initial descent point, ‘Time to VNv’ indicates the time to
reach the target altitude at the point specified in the Vertical Nav settings.
To Course—The recommended direction to steer in order to reduce
course error or stay on course. Provides the most efficient heading to get
back to the desired course and proceed along your route.
Track—The direction of movement relative to a ground position. Also
referred to as ‘ground track’.
Trip Odometer—A running tally of distance travelled since last reset.
Also see ‘Odometer’.
Turn—The angle difference between the bearing to your destination and
your current track. ‘L’ indicates you should turn left, ‘R’ indicates you
should turn right. The degrees indicate the angle you are off course.
VMG—Velocity Made Good. The speed you are closing in on a destina-
tion along a desired course. Also referred to as the ‘vector velocity’ to
your destination.
VS to Target—The vertical speed required to descend from current alti-
tude and position to the target altitude at the point specified in the
Vertical Nav settings.
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APPENDIX G
Navigation Terms
WPT 1
Course Error
NORTH
WPT 2
B
e
a
rin
g
Speed
Distance
AIRPLANE
Course
T
ra
c
k
V
N
A
V
P
R
O
F
IL
E
GLIDE RATIO TO TARGET
DISTANCE TO TARGET
DISTANCE TO PROFILE
TARGET ALTITUDE
AIRPORT
Vertical
Navigation
GPS III Pilot B2 4/1/99 2:02 PM Page 99