DR Navigation Flashcards
If you know the drift that you have experienced since the last positive fix you can calculate …..
the TMG by applying that drift to the constant heading
If you know the time that has elapsed since the last positive fix ….
the distance flown can be calculated by appluing that time to the constant GS
When you know both the track and distance you have flown since the last positive fix …..
you can determine your present position
TMG can be found by referencing …..
ground features or nav aids
The DR position is found simply by measuring the …..
distance flown along the track since the last fix
DR is not a method of navigation
T/F
True - it is a technique used by the pilot along with other aids that may be available during the course of a flight
In map reading what should you do first …..
establish your position via a DR track from your last positive fix. Once you have done that look at the map for features ect then look out the window and compare.
DONT look outside then at the map as this can confuse you
When reading from a map always …..
read from the map to the ground
When ever you set out to locate a position from a map you myst first check the …..
time and then establish a DR position.
If you cannot establish a positive fix …..
go back to your last positive fix and look 150 - 200 either side of the track and you will be in this arc
The only time you should be reading from the ground to the map is when …..
you have an area of probability established
If you maintain a constant heading and a constant TAS in a constant wind the …..
track you make will be a straight line
A small change of heading will produce …..
the same change in TMG with no change in GS
This assumption is correct for smaller changes of +/- 300 or so
Anything larger than 900 will produce a greater heading change than 900
Describe a multipilcation problem on the E6B ….
place the 10 on the B scale over the number to be multiplied
so if it is 8 x 9 place the 10 on the B scale under the 8
Now read around the B scale to the number 9 and look on the A scale for the answer
Describe a division problem on the E6B …..
150 / 5
Place the 150 on the A scale and rotate the 5 on the B scale until it is under the 150
read the answer at the 10 on the B scale
What is the formula to find the track error in degrees …..
d x 60 / D
d = distance off track
D = distance travelled since the last fix
The answer is measured in degrees off course or your track error