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Variation used for True bearing

Forum - Coastal Navigation - Variation used for True bearing
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Student
Atta Kagazchi
Port Perry, Canada
Captain Level V
Status: Really Big Time Sailor
Qualified days: 211
Variation used for True bearing
Posted 2017, May 05 16:09
I have a question from Module 11, Leeway and Current. Why, when plotting the Example of sailing out of Port Fitzroy, do you only apply a 6 deg Variation to the Magnetic bearing (67 deg) to obtain the true bearing (61 deg) when the Variation shown on the Compass Rose on Chart 3 is 7’25”W? Am I missing something really simple here?
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Administrator
Grant Headifen
Reply 2017, May 05 16:27
We added Assume magnetic variation is 6 deg W (the compass rose says 7 deg 20' W in 2005 moving 8'E annually - thus approximate this to 6 deg W for this exercise at this time).
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Student
Atta Kagazchi
Port Perry, Canada
Captain Level V
Status: Really Big Time Sailor
Qualified days: 211
Reply 2017, May 05 19:15
Thanks Grant ...
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