Compass Compensation Worksheet Examples
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Examples of aircraft magnetic compass swinging and compensation to produce a compass correction card.
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COMPASS COMPENSATION WORKSHEET
(Question 1)
CORRECTION SWING QNSC PEWB
APP HDG MAG HDG COMP HDG DEV dev = ldg compass hdg - a/c compass
hdg
N 359 3 -4 res dev = dev - coeff. A
E 91 85 6
S 178 170 8
W 267 265 2
Coeff. C: N - S = -6
2
MCR: 170 + 6 = 176
(N-S correction)
Coeff B.: E - W = 2
2
MCR: 265 - 2 = 263
(E-W correction)
CHECK SWING
APP HDG MAG HDG COMP HDG DEV RES DEV
NW 317 316 1 -2
N 0 358 2 -1
NE 47 42 5 2
E 93 89 4 1
SE 135 134 1 -2
S 179 177 2 -1
SW 225 220 5 2
W 273 269 4 1
Coeff A.: 2 + 4 + 2 + 4 = 3
4
CORRECTION CARD
FOR STEER
0 1
45 43
90 89
135 137
180 181
225 223
270 269
315 317
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COMPASS COMPENSATION WORKSHEET
(Question 2)
CORRECTION SWING QNSC PEWB
APP HDG MAG HDG COMP HDG DEV dev = ldg compass hdg - a/c compass
hdg
N 355 358 -3 res dev = dev - coeff. A
E 92 92 0
S 184 183 1
W 272 266 6
Coeff. C: N - S = -2
2
MCR: 183 + 2 = 185
(N-S correction)
Coeff B.: E - W = -3
2
MCR: 266 + 3 = 269
(E-W correction)
CHECK SWING
APP HDG MAG HDG COMP HDG DEV RES DEV
NW 318 316 2 0
N 1 0 1 -1
NE 49 47 2 0
E 92 89 3 1
SE 137 135 2 0
S 182 181 1 -1
SW 229 227 2 0
W 276 273 3 1
Coeff A.: 1 + 3 + 1 + 3 = 2
4
CORRECTION CARD
FOR STEER
0 1
45 45
90 89
135 135
180 181
225 225
270 269
315 315
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COMPASS COMPENSATION WORKSHEET
(Question 3)
CORRECTION SWING QNSC PEWB
APP HDG MAG HDG COMP HDG DEV dev = ldg compass hdg - a/c compass
hdg
N 2 355 7 res dev = dev - coeff. A
E 88 84 4
S 182 185 -3
W 268 272 -4
Coeff. C: N - S = 5
2
MCR: 185 - 5 = 180
(N-S correction)
Coeff B.: E - W = 4
2
MCR: 272 - 4 = 268
(E-W correction)
CHECK SWING
APP HDG MAG HDG COMP HDG DEV RES DEV
NW 317 316 1 0
N 0 358 2 1
NE 48 47 1 0
E 89 89 0 -1
SE 136 135 1 0
S 183 181 2 1
SW 224 223 1 0
W 270 270 0 -1
Coeff A.: 2 + 0 + 2 + 0 = 1
4
CORRECTION CARD
FOR STEER
0 359
45 45
90 91
135 135
180 179
225 225
270 271
315 315
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COMPASS COMPENSATION WORKSHEET
(Question 4 - CAAUK CAP 562 Leaflet 34-20 Pg 18 )
CORRECTION SWING QNSC PEWB
APP HDG MAG HDG COMP HDG DEV dev = ldg compass hdg - a/c compass
hdg
N 0 6 -6 res dev = dev - coeff. A
E 90 88 2
S 180 182 -2
W 270 270 0
Coeff. C: N - S = -2
2
MCR: 182 + 2 = 184
(N-S correction)
Coeff B.: E - W = 1
2
MCR: 270 - 1 = 269
(E-W correction)
CHECK SWING
APP HDG MAG HDG COMP HDG DEV RES DEV
NW 315 317 -2 0
N 0 4 -4 -2
NE 45 48 -3 -1
E 90 89 1 3
SE 135 138 -3 -1
S 180 184 -4 -2
SW 225 227 -2 0
W 270 269 1 3
-16
Coeff A.: -16 = -2 NOTE: Use avg. of all 8 headings because -6/4
= -1.5
8
CORRECTION CARD
FOR STEER
0 2
45 46
90 87
135 136
180 182
225 225
270 267
315 315
