Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship

      

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Hal Roth
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SS61 course to steer

Subject: SS61 course to steer
From: Patrick McVey (mcveyp.MOHAVE@XXX.XXX)
Date: Fri Apr 07 2000 - 10:19:08 EDT

On leg 61 departing Rio. On the question of Course To Steer.
1) Correct me if I'm wrong: This is the course one would steer which accounts for tidal stream, .6 knots drift at 185d set. Correct. THEN, one applies the magnetic variation & compass deviation. I can get the CTS but I don't know if one adds the compass corrections.

2) I am using a graphical method for solving tidal stream. Can someone point me to a mathematical formula. I didn't readily see one in the 4mulas zip file.

Thanks for the input. Its good to be back after some absence. Thanks to the group members for this tremendous resource.
Patrick



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