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Dan Hogan reply to me asking the difference between Compass Coures,
Magnetic Course, and Course to Steer was an eye opener for me. He had
previously given me the old TVMDC (uncorrecting) and CDMVT (correcting),
which I could never remember which went with which.  Since uncorrecting
and correcting are universal terms, I figured I had better learn which
went with which so I can understand what someone means when using the
correcting and uncorrecting. Now it makes sense after thinking about
it.  Correcting means we are going toward True (making something right)
and Uncorrecting is going from True to .... Compass.
        It is good to find ways of remembering things and also important to
understand terms everyone else is using.
        TVMDC					CDMVT			
True Virgins Make Dull Companions      Can Dead Men Vote Twice
at Weddings adding	               at Elections
adding West sub. East                  adding East and Sub West.

        UnCorrecting         		    Correcting
           []		    ___ T ___		/\
           []    				[]	
  Add 	   []	 	    ___	V ___		[]	Add
 West	   []      				[]     East
           []       	    ___	M ___		[]
 Subtract  []       		 		[]   Subtract
   East	   []        	    ___	D ___		[]     West
           [] 			                []
           \/		    ___	C ___		[]
        Looking at TVM  makes it easy to understand Dan's statement Magnetic
Course is True Course adjusted for Variation, and Compass Course is True
adjusted for both Variation and Deviation. Also looking at the TVMDC one
can see going from Compass Course to Magnetic Course it is adjusted for
Deviation only..
        The infamouse Course to Steer, Desire Course or just where I want to go
take in to account the current, set, drift etc. Boy I hope I got all
this straight!
        The Celesticomp V asks for Desire Course, +- VAR&DEV, Log Speed,
Current Direction and Current Velocity.  The results are Course to Steer
to maintain Desire Course.  Then there is also a program for Course Made
Good using the same parameters except for Desire Course it asked what
course did you steer then it will give you the course made good. Boy I
hope I got all that straight too!!!
        I know this has been lengthly, but I have a couple other questions:
1) How is desired course plotted on charts?   True or Magnetic?
2) When one has a Chart that has only the true markings, no compass
rose, how is course usually plotted? True or magnetic ???

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Learning the Hard Way!!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Millard Kirk KB8YQO 	Email - mkirk@XXX.XXX
 116 Lewis Ave	     	Homepage- http://webpages.marshall.edu/~mkirk/
 Barboursville, WV      A West Virginia Blue Water Sailor
 25504                  (304) 736-6544
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