NavList:
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Re: Silicon Sea: Leg 82 Q4
From: Dan Hogan
Date: 2001 Dec 10, 8:21 AM
From: Dan Hogan
Date: 2001 Dec 10, 8:21 AM
On 8 Dec 2001, at 13:20, Paul Hirose wrote: [Snip Comment] > > > The sky has been overcast for days. we have been unable to get a sight. Var > > 10.0dE Dev 1.0dE. Speed 10.4 Kts. > ... > > 4) What is the Speed Made Good(SMG) to this DR? > > What is the Compass Course(CCMG) this DR? > > > I don't understand why the correct answer is 10.8 kt, not 11.1. The > speed used for the DR (which does not include current) is 10.4. The > current is .7 kt flowing toward 285. That's just 6 deg off our course, > so for practical purposes it should add directly to our speed thru > water, shouldn't it? > > Also, why isn't the correct answer for CCMG identical to the compass > course we're been steering? Hmmm. I think I left out some information. See revised Leg 82 comming out. > The part I clipped out is the sun line at 2010Z, but it should have > nothing to do with the DR. It's crossed with another sun line for a > running fix later. > > -- > > > paulhirose@earthlink.net (Paul Hirose) Dan Hogan WA6PBY C27 "Gacha" dhhogan@verimail.com Nav-L Page: http://www.wa6pby.com
