More Coast Guard Mucking

I haven’t been here much lately between rush USCG submittals and deadlines on real jobs.

I had thought I was done with mucking around with the recent USCG catamaran submittals and could get some work done.
Wrong!
One of the hulls measured a half inch deeper than the other. That came to a difference in displacment of 3.5 pounds and a possible heel difference of 0.126 degrees. Unless I can talk them out of it, they will insist on a new complete stability study for each hull. As it is now, the stability is more than 40 times what is required for metacentric height, and over twice what is required for intact stabilty.
The whole crew there seems to be new. I’m trying to talk them out of this silliness. They do have unlimited power on this kind of thing.

2 thoughts on “More Coast Guard Mucking”

  1. Hi Kurt, you know me and numbers… Your heel number suggests a hull center-center beam of 19′. Any cat that size will have way more displacement per inch at the waterline than 7lb… I’m sure you’re onto it…!

    Hope you don’t have to do anything like as much ‘mucking’ (that’s putting it politely) as you had to in the 80s/90s eh.

    Do you have a Dropbox account?

  2. its only a half inch deeper in one spot. I modeled the two hulls from the drafts and just used the output. I did guess it would be more difference.

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