Cockpit Coaming Height?

Ben M

Active member
I am building a ply-on-frame BBSB-ish boat. All frames & transom are complete. Next step is attaching the frames together with the pieces that will become the cockpit sides/coaming. As it stands now, the coaming will be 2 1/4" high. Is that enough for a very low sneak boat?

I was planning on a slight deviation from the plans and making a little higher coaming on the sides. The deck curves from the centerline down to the gunwales. Instead of cutting the fore and aft coamings to follow the lines of the deck, I was thinking to keep those fore and aft coamings straight as the deck falls to each side. The side coamings would then join the fore and aft coamings at 4" or so from the deck. The fore and aft coamings would be 1.5" or so at center. Does this make sense?

Would that plan make my coaming too high? This is obviously a safety issue since the coaming's entire purpose is to provide a little more freeboard. But I don't know if 2" of extra freeboard would make that much difference from a safety standpoint anyway. Then there's the whole issue of height & mucking about with the boat's good lines from the concealment perspective . . . Most of my hunting will be in rocky, shallow rivers with riffles here and there, though I may have a go at some inshore pockets around big water where I may encounter some chop.

Here's a link to the design if you want to take a look & see the lines of the deck: http://spirainternational.com/hp_mars.html

I would really appreciate some opinions here! Y'all are FAR more knowledgeable than I am! This is my first build . . .
 
Ben,

Nice looking boat.

Looking at the site I can understand your concerns. Two questions for you, how big of water do you plan to use her on? and will you equip her with a spray shield? With canvas she's probably fine. In big water an extra 2" isn't going to mater, if your taking green water over the deck, as it's coming in anyway. With a spray shield much of the white water, spray and foam of wave tips will be directed down either side of the cockpit and the low coaming will work to keep nuisance water out.

Picture to help others provide input:

View attachment MRat.jpg

Enjoy,
Scott
 
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Scott

Thanks for the input!

Most of my hunting will be in the shallow, riffle-y (I think I just invented that word . . . hahaha) rivers of central Virginia & North Carolina, with the occasional venture out to the Rappahannock or Eastern Shore of Va.

I am planning on adding a dodger.
 
I think with a canvas dodger to break the water from the front that the hight it calls for will be more then enough. If you add decoy racks to the aft deck and a dodger to the front. Have the dodger hook to the oar locks and the decoy racks go to the oar locks from the back. so you will have the dodger and racks meet at the oar locks and that will be an extra barrier. I don't have a picture with both on to show you what i mean but you get the idea. My coming is only 1 inch high.

Here you can see how the decoy racks will give extra protection from water
View attachment 137.jpg
And here the canvas dodger. Mine is not finished yet but will hook to the oar locks with SS snaps
View attachment 039.jpg

View attachment 007.jpg

View attachment 039.jpg

View attachment 039.jpg
 
Thanks, Chris.

I like your idea of having the dodger and decoy racks meet together to create a little more protection.

A rear decoy rack is something I hadn't decided on with any certainty yet. My river setup is usually 1.5doz dekes or so and I wasn't sure I really needed a rack for them. It sure would be nice to keep decoy bags out of the floor though . . . and if the rack gives me a little more protection for my rare bigger-water ventures, I really may want to add one.

As for the coaming, unless someone has some strong advice to the contrary, I think I'll go with the spec 2.25" height. Actually, it's 3" at the front of the cockpit and 2.25 at the rear . . .
 
I think that hight is more then enough I don't think you will have any trouble. Good luck.
 
Thanks Chris . . . and your rebuild is looking absolutely great! Been following your posts without commenting much . . .
 
I've had my eye on this design for a while now... I'm thinking of building it for a friend :) let me know how it all turns out, and how much it all costs...

Sincerely

Anthony
 
I've had my eye on this design for a while now... I'm thinking of building it for a friend :) let me know how it all turns out, and how much it all costs...

Sincerely

Anthony

Will do . . . I am sure I will have more questions to post as I progress!
 
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