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Go Back   SailNet Community > General Interest > General Discussion (sailing related)
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  #11  
Old 04-07-2011
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Quote:
Originally Posted by Boasun View Post
Deviation is the magnetic signature of your vessel. And as you change course the deviation will change. This is why you have a deviation table/card.
There are a couple of tricks to ensure that your deviation card is correct. They are easy. But having a compass adjuster swing your vessel for the first time is so much easier. Takes about a tad more then a half a day to do it.
What I said....
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  #12  
Old 04-07-2011
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Oh wow - brings back memories of the CPS (USPS) Piloting Course

TVMDC

T - True - true - as in pointing to the North Pole and not the magnetic north pole.
V - Variation - depends where you are in the world - where we boat it is about 020 degrees West
M - Magnetic - what the magnetic course is
D - deviation - what started this last part of the thread - about three or four correct answers - caused by stuff on your boat - motor, engine, honking big sound system speakers, the wire in bras and bathing suit tops (why they should not be worn) etc.
C - Compass - the thing you can use to navigate with.

As to TVMDC:

True + Variation = Magnetic & Magnetic + Deviation = Compass (navigation formula)
or
TV Makes Dull Children
or
True Virgins Make Dull Companions

But - I am sure you all knew that.

Sunny day here - snow is going, counting the days until tarps come off and then until launch!

Yea Spring!!!!!!

Rik
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  #13  
Old 04-07-2011
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Man you guys really know your stuff! And you remember it too! I am sure if you are on international waters you use this stuff everyday! I am taken this course because i am Unemployed and board , I am a Information Professional Technology guy! Maybe you can help me remeber the formulas for Bearings, Drifting, current, figuring out distance, speeds , Time...
I just forget this stuff but this class is one week long!
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  #14  
Old 04-08-2011
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Hey Thanks to everyone here with the little help here i got! I passed my test!
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