Greetings and welcome aboard:
I don't mean to be flip but generally experience dictates the best methods of production. I understand the basic shape of a boat or a dory or even a canoe, they are all radically different, but are you planning on making them look like they are clinker built or clay bottomed, there would be a huge difference. Clinker built you might get away with slab building and then planking the boat as one would do a real boat but you would need to spile the planks just as one would in a real boat. A clay bottom would certainly not be something that would suggest slab construction since it is difficult to make a developable shape from a flat slab. There are a lot of considerations, such as use, you wouldn't want functional pottery to be low-fired for sanitary and health considerations. Who is your customer, are you planning to export these to the US? Do you understand the various entities you would have to satisfy There is much to consider before one goes into production. I'm afraid a forum is better suited to answering fairly simple questions but does not have the ability to answer a question in depth. A perusal of the other posts on the forum would give you an idea of the type of questions that lend themselves to simple answers. We can point you in the right direction but only education and experience will give you the tools to produce a marketable product.
Good luck with your project.
Thanks for all the suggestions...(I think?)...but all I asked for was if anyone knew of any ways to make boat bowls. Such questions as contents and import export rules are something that would be looked into on my own...by the way...just because "Newbie" is by soeones name do not assume they are new to pottery...I am but new to the site and have been working on Ceramics and Pottery since the 70's. And yes...I consoder that flip. The first person was helpful