Looks like these are my only local options in marine plywood.

Douglas fir A/D quality 1/2" is $55 a sheet

Another supplier has Meranti or Okume but only 3/8" thick or 3/4".
3/8" Meranti is $97.50 and okume is $112 a sheet.

I have someone asking me to build them a boat. I am trying to decide on which plywood to use. I am leaning toward the 3/8" Meranti because I feel like it will be better quality ply. Playing with some 3/8" plywood mockups I don't really think that is going to be an issue. If were were beating around the surf then maybe.

The Douglas fir is much cheaper but it is A/D quality and I am afraid the core will have voids in it. I don't know this of course, just a feeling. I realize I could turn the A face toward the cockpit and put the ratty side away but I don't like having a ratty side period.

Given these choices what would use? Shipping in 1 or 2 sheets of plywood will not save me anything. Shipping costs are just to high. So I need to buy local (for now).