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Help identifying catamaran by description only

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(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 
[#31881]

New here and new to sailing.  I got this boat in pieces and can’t identify it.  I can’t post photos so I have to describe it. There is no hull number that I can find.  18’ hulls and 26’ mast.  The crossmembers are what confuse me, they are round aluminum with the front 3” and the rear one 2.5”. The hulls have a strip built in to the inboard sides with holes I assume for securing the trampoline.  Are there any old catamarans that used round members?  The closest thing I can find online in photos is a Prindle.  There is a sticker from a sailing club from 1982


 
Posted : May 24, 2026 11:59 am
Cat Scratch
(@cat-scratch)
Posts: 208
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My Prindle 18 had a longer mast than 26 ft. Does it have asymmetric hulls like the early prindles (16 & 18) and the hobie 16?

 


 
Posted : May 24, 2026 3:16 pm
Damon Linkous
(@damon-linkous)
Posts: 4063
Captain Admin
 

Posted by: @wbradbury

New here and new to sailing.  I got this boat in pieces and can’t identify it.  I can’t post photos so I have to describe it. ..

Welcome to TheBeachcats.com! Post again and you should be able to add photos. 

Round crossbeams aren't unusual.  

There is a beachcat identification archive at

https://archive.thebeachcats.com/pictures/index.php?/category/1331

See if anything there matches your boat.

Are there any numbers/letters scratched/etched into the stern? Beachcsts usually had a HIN (hull identification number) either directly in the stern fiberglass or on a plate attached there or on the rear beam.

 


 
Posted : May 24, 2026 6:11 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 25, 2026 7:47 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 25, 2026 7:49 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 25, 2026 7:49 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 25, 2026 7:50 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 25, 2026 7:51 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

First photo shows the size of the sterns.  I haven’t seen any others online this small.  Figured they might aid in identification.


 
Posted : May 25, 2026 7:52 pm
Steve
(@dogboy)
Posts: 1305
Master Chief Registered
 

Is there an insignia or symbol on the sail?

 

sm


 
Posted : May 26, 2026 12:43 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

@dogboy No, just plain white.  And the hulls are symmetrical…someone asked about that too


This post was modified 4 weeks ago by wbradbury
 
Posted : May 26, 2026 8:02 pm
Cat Scratch
(@cat-scratch)
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Does it have a 'Hull Identification Number' (HIN) on or near the transoms? 

It might be a one-off boat.  Appears to have very low-volume hulls. Your hand looks like a giant's hand near that transom if the transom was near the vertical measurement of a typical cat. 🤣 


 
Posted : May 27, 2026 2:46 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

@cat-scratch no number I can find.  Yes with the tiny rear end it’s hard to believe the hull is 18’ long.  Other than the small end, the other sections of hull are commensurate in profile with similar length boat hulls.  I’m going to say home built when I go to register it with the state.  Since I don’t have a title, it’s my only option.


 
Posted : May 27, 2026 2:55 pm
Cat Scratch reacted
(@crazyru)
Posts: 16
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Is there mainsail only? No jib?

I would say this is home built first generation A-cat.

it should be light too, 200 lbs all together, right?


 
Posted : May 29, 2026 8:32 am
(@jonathan162)
Posts: 330
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Not a bad guess - could well be an A Class, but that tapered-to-nothing transom is pretty strange - not like mine at all.  Also, I don't have a dolphin striker.

I'm really looking forward to a pic of it all assembled.

 


This post was modified 3 weeks ago by jonathan162
 
Posted : May 29, 2026 9:22 am
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

@crazyru it is light, I doubt much more than 200


 
Posted : May 29, 2026 9:42 am
(@crazyru)
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Posted by: @jonathan162

Not a bad guess - could well be an A Class, but that tapered-to-nothing transom is pretty strange - not like mine at all. 

tapered sterns were hot in 60-s and 70-s. Just look at early Gaugeon Brothers boats. 
I am pretty sure someone would experiment with such hull design in open development class. 
Here is a primer on A-class history:

https://www.a-cat.org/node/8

one of the first a-cats, Australis, was a double ended. Actually. It is probably Australis. Piece of history.

 


This post was modified 3 weeks ago by crazyru
 
Posted : May 29, 2026 10:03 am
Cat Scratch reacted
Cat Scratch
(@cat-scratch)
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Australis:

https://sailwiki.com/yacht/australis-catamaran/

https://sailboatdata.com/sailboat/australis-catamaran/

Looks like it might be Australis.

 

 


 
Posted : May 29, 2026 10:50 am
(@crazyru)
Posts: 16
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Australis pic

 


 
Posted : May 29, 2026 10:55 am
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

I’ll be working on it this afternoon, I’ll try to get better photos of it overall


 
Posted : May 29, 2026 2:10 pm
(@crazyru)
Posts: 16
Lubber Registered
 

Also measure beams. A-cats are narrow(ish) at 7.5 ft


 
Posted : May 29, 2026 2:42 pm
Damon Linkous
(@damon-linkous)
Posts: 4063
Captain Admin
 

I am trying to remember the name of an 18 foot extremely lightweight cat that I sailed alongside for hours during a "round the island" race once upon a time. The only one I ever saw. The mast was so light you could just toss it up with one hand.


 
Posted : May 29, 2026 2:46 pm
(@crazyru)
Posts: 16
Lubber Registered
 

Unicorn? It is one of original A-cats which migrated into independent one design class in UK. 


 
Posted : May 29, 2026 4:23 pm
(@jonathan162)
Posts: 330
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No, I have a Unicorn, so I would have offered that in a hot minute.  My transoms are "normal".  Pictures!  Pictures!

(Funny I should be clamouring for them, because others have asked for pics of mine.  At the moment it's in pieces - one of the hulls is in my basement with the aft deck pulled off.  When I sailed it last summer the deck+hull separated, and I didn't want to push it to failure, so I'm reinforcing it.

 


 
Posted : May 29, 2026 5:34 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

Didn’t get any work done and can only offer one more photo so far.  This shows the hull profile, sorry it’s Upside Down 


 
Posted : May 29, 2026 5:52 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 


 
Posted : May 29, 2026 5:53 pm
Cat Scratch reacted
(@jonathan162)
Posts: 330
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What's that marking (sticker?) up at the bow?


 
Posted : May 29, 2026 6:26 pm
(@wbradbury)
Posts: 15
Lubber     Location - City/State: Chocowinity NC Registered
Topic starter
 

@jonathan162 Grateful Dead sticker


 
Posted : May 29, 2026 7:01 pm
(@jonathan162)
Posts: 330
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Of course - would have IDed it if I'd bothered to d/l into an image editor to zoom in far enough.


 
Posted : June 1, 2026 1:43 pm
(@jonathan162)
Posts: 330
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Posted by: @wbradbury

New here and new to sailing.  I got this boat in pieces and can’t identify it.  I can’t post photos so I have to describe it. There is no hull number that I can find.  18’ hulls and 26’ mast.  The crossmembers are what confuse me, they are round aluminum with the front 3” and the rear one 2.5”. The hulls have a strip built in to the inboard sides with holes I assume for securing the trampoline.  Are there any old catamarans that used round members?  The closest thing I can find online in photos is a Prindle.  There is a sticker from a sailing club from 1982

There's no shortage of boats with round crossbeams - I think it was common among early NACRAs like the 5.2; certainly, SuperCats have them, etc., so I don't think there's much to learn from that.  The A-Class Australis sounds like a really good bet.

As far as "new to sailing" goes... Welcome!  Personally, I think it's best to learn the basics on a unimaran (aka monohull, dinghy), because there are fundamental boat behaviours that are much easier to learn on a monohull, still apply to cats, but are harder to learn on cats.  But you got whatcha got, right?  One thing I can tell you, as a new old-A-Class sailor with only a few hours on the water, is that everyone who gets a dreamy look when talking about sailing them is right:  It's kinda like sailing on a cloud.  Super-light, super-responsive, and (even when the boat is still way outa tune like mine) just really fun, unlike so many rides that can be scary and a real workout.  And it was really interesting to me that - over the winter before I first sailed it, while it was just sitting outside the dining room window, covered in snow - I had the feeling that I knew what it was going to feel like to sail.  I've had a few boats, and never had that sense before of a boat I'd never been on.  And it was just like that, which was strange, but very cool.

You should be up for some fun, alright.

 


 
Posted : June 1, 2026 1:58 pm
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