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Old 07-12-2012, 15:33   #1
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Documenting Cal 2-27... Tonnage?

I am thinking about getting my old Cal 2-27 documented. Currently it is under Louisiana registration but I plan on getting a COD. I haven't hauled her out but just scaling the line drawings I came up with 5.3 net tons using the Simplified Measurement system. Has anybody else here applied for a Certificate of Documentation for a 2-27, and was your tonnage calculation pretty close to mine?
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Old 07-12-2012, 16:31   #2
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Re: Documenting Cal 2-27... Tonnage?

The CG doesn't really care about accuracy here. Guess on the low side because some fees around the world are based on the tonnage.
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Old 08-12-2012, 19:22   #3
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Re: Documenting Cal 2-27... Tonnage?

USCG tonnage has no relation to the "weight" of the vessel. You don't need to haul or weigh the boat.
Tonnage is determined by a formula based on internal volume of the boat, minus tankage volume. Each 40 cubic feet is one ton.
A rough guess is that your Cal 2-27 would be well under 10 tons.
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Old 08-12-2012, 19:54   #4
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Re: Documenting Cal 2-27... Tonnage?

The USCG document center estimated mine at 10 -12 tons but it's only 8 tons in reality. They don't measure freeboard.

Just fill out the MSC form and they'll do the rest.
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Old 10-12-2012, 09:31   #5
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Re: Documenting Cal 2-27... Tonnage?

Quote:
Originally Posted by sailronin View Post
USCG tonnage has no relation to the "weight" of the vessel. You don't need to haul or weigh the boat.
Tonnage is determined by a formula based on internal volume of the boat, minus tankage volume. Each 40 cubic feet is one ton.
A rough guess is that your Cal 2-27 would be well under 10 tons.
LOL! I know that... in my original post I stated that I had already done a preliminary estimate by scaling the line drawing of the boat. And actually, it is LxDxB (in feet and 10ths) x .5 for a sailboat with fin keel, x .9 for inboard engine, / 100 so no, using the CG's Simplified Measurement System, it is not 40 cubic feet per ton. For my boat it is 45.

There were a lot of these boats built, and so I simply want to make sure that my claimed tonnage is in line with everybody else's who has documented their Cal 2-27 before I put in the application. As a life-long professional mariner, I have been filling out and submitting paperwork to the USCG for my entire adult life, and I have learned the importance of getting all the tees dotted and eyes crossed. And BTW, no, I have no plans to "weigh" my boat! The reason I need to haul it out is for a bottom job, and it will be my opportunity to take proper measurements, too.

Thanks everyone, for all the replies. I will just go with my measurements and call it good.
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Old 10-12-2012, 20:15   #6
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Re: Documenting Cal 2-27... Tonnage?

Quote:
Originally Posted by GrowleyMonster
getting all the tees dotted and eyes crossed.
My eyes go crossed once in awhile too.

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