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Forum: Seamanship & Boat Handling

31-10-2011, 09:23

Replies: 21

Calculating Passage Times on 1000nm+ Routes

Views: 6,763

Posted By Bash

Re: Calculationg passage times on 1000nm+ routes

To address the second part of your question as regards Evans' formula, when I work his calculations for my boat, I come up with an average speed of 5.85 kts, which would give me an average day of...

Forum: Seamanship & Boat Handling

31-10-2011, 08:45

Replies: 21

Calculating Passage Times on 1000nm+ Routes

Views: 6,763

Posted By Bash

Re: Calculationg passage times on 1000nm+ routes

One of our CF advisers, Evans Starzinger, researched this question and published an article on it in 2005 in Cruising World.

His formula was : IMS rated speed in knots = 2.62 + 0.066*SA/D ratio...

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