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    Re: Silicon Sea: Leg 82
    From: Eric Haberfellner
    Date: 2001 Dec 03, 8:23 PM

    Well... I am not sure if there is a difference. I interpreted the question
    to mean "after figuring out the true course that we want to set out on and
    correcting for var. and dev. and current what course should we tell the
    helmsman (who may not be too bright, after all he is not a navigator) to
    steer on the compass". Now Dan asked for a compass course I thought that
    this is what he wanted, however you raised the question of is this the same
    as a compass heading. My first guess is that the answer is yes. There may be
    a subtle distinction however and that may be why I can't get the right
    answer as the one that Dan released accidently. I am about 3 degrees off.
    
    Dan, can you help clarify this?
    
    -----Original Message-----
    From  Navigation Mailing List
    [mailto:NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM]On Behalf Of Brian Whatcott
    Sent: Monday, December 03, 2001 7:39 PM
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject: Re: Silicon Sea: Leg 82
    
    
    At 09:58 PM 12/2/01, Eric Haberfellner  wrote in
    response to my call for help; and this is a request for further
    clarification.
    
    >I asked:
    > >Is compass course the compass track between present position and
    >destination?
    
    Eric responded - in part:
    
    >Compass course is the course you see on your compass with no correction for
    >deviation or variation.
    
    
    This sounds like what I think of as a "heading".
    It accounts for the current set - so if you started with a true initial
    direction to the destination, and did a triangle of current speed and
    direction, and desired track at the vessels speed through the water, the
    third  side of the triangle would be the vessel's effective speed and true
    track made good, then corrected for variation and deviation to arrive at
    compass heading.
    This "compass heading";   is this called the compass course??
    
    Thanks again for the helpful tips.
    
    Brian W
    
    
    Brian Whatcott
       Altus OK                      Eureka!
    

       
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