Do NOT use blind rivets, aka Pop rivets....for reasons that should be obvious.
Rivet setting is an art that requires some practice. I'd use up several on testing, you want every rivet in your boat...even the first...to be perfect.
If blind rivets worked on boats, you can be sure the manufacturers would be using the heck out of them; they are much, much faster/cheaper to install.
Often wrong, never in doubt...