Glenn Ashmore wrote:
If you mean "Baltic" "Finnish" or Russian birch much of it is
intended for
furniture and interior cabinet work so it is not made with
waterproof glues.
It is super strong but much harder to bend and comes in 50"x50" sheets
rather than 4'x8'.

It's 60"x60" but whose counting, it is totally unrealistic to even
think about it for a marine application.

Lew