old guy :)
Join Date: Feb 2008
Location: Fredericton, NB, Canada
Thanked 14 Times in 12 Posts
Rep Power: 9
Oh wow - brings back memories of the CPS (USPS) Piloting Course
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)
TV Makes Dull Children
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!
Irwin Citation 34