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Coastal Navigation Course
Chapter VII

Answers to TVMDC Practice Lesson
Remember: Going from True to Compass Add West and Subtract East
Going from Compass to True, Subtract West and Add East

True

Variation

Magnetic

Deviation

Compass

1. 070 5 E 065 0 065
TVMDC + W - E - 070 - 5 = 065 +/- 0 = 065
2. 097 2 E 095 3 W 098
TVMDC + W - E - 097 - 2 = 095 + 3 = 098
3. 236 1 W 237 3 E 234
CDMVT - W + E - 234 + 3 = 237 - 1 = 236
4. 080 4 E 076 3 W 079
CDMVT - W + E - 079 - 3 = 076 + 4 = 080
5. 178 3 W 181 2 W 183
TVMDC + W - E - 178 + 3 = 181 + 2 = 183
6. 243 5 W 248 0 248
CDMVT - W + E - 248 =+/- 0 = 248 - 5 = 243
7. 355 4 W 359 4 E 355
CDMVT - W + E - 355 =+ 4 = 359 - 4 = 355
8. 334 1 E 333 3 W 336
TVMDC + W - E - 334 - 1 = 333 + 3 = 336
9. 156 10 W 166 5 W 171
TVMDC + W - E - 156 + 10 = 166 + 5 = 171
10. 149 8 E 141 4 W 145
CDMVT - W + E - 145 - 4 = 141 + 8 = 149
11. 089 4 W 093 1 E 092
TVMDC + W - E - 089 + 4 = 093 - 1 = 092
12. 138 3 E 135 1 W 136
TVMDC + W - E - 138 - 3 = 135 + 1 = 136
13. 238 3 W 241 4 E 237
CDMVT - W + E - 237 + 4 = 241 - 3 = 238
14. 245 2 W 247 3 W 250
TVMDC + W - E - 245 + 2 = 247 + 3 = 250
15. 340 4 E 336 10 W 346
CDMVT - W + E - 346 - 10 = 336 + 4 = 340

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