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'.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

"Edward Stammer" wrote in message
...
Does anyone know if cheaper birch plywood with 8 layerrs would be usable
as Marine plywood?

$50 per sheet versus paying approxiamately $100 a sheet.

Ed