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21
6
VOR NAVIGATION
VOR
station
0
°
10
°
20
°
30
°
40
°
50
°
60
°
70
°
80
°
90
°
100
°
110
°
120
°
130
°
140
°
150
°
160
°
170
°
180
°
190
°
200
°
210
°
220
°
230
°
240
°
250
°
260
°
270
°
280
°
290
°
300
°
310
°
320
°
330
°
340
°
350
°
N
Magnetic
north
Desired course
Aircraft heading 40
°
123.65
VORTAC
SEATTLE
116.8 Ch 115 SEA
THE AIRCRAFT IS ON COURSE
VOR
station
0
°
10
°
20
°
30
°
40
°
50
°
60
°
70
°
80
°
90
°
100
°
110
°
120
°
130
°
140
°
150
°
160
°
170
°
180
°
190
°
200
°
210
°
220
°
230
°
240
°
250
°
260
°
270
°
280
°
290
°
300
°
310
°
320
°
330
°
340
°
350
°
N
Magnetic
north
Aircraft should be
heading 40
°
Aircraft heading 46
°
(6
°
off course)
Flown course
123.65
VORTAC
SEATTLE
116.8 Ch 115 SEA
THE AIRCRAFT IS OFF COURSE
The course deviation indicator ap-
pears when the aircraft is off
course. In this example, the aircraft
is 6 degrees off course to the left.
The pilot must turn more than 6
degrees right to get back on
course.
V
OR NA
VIGA
TION