THis may seem like a trival point, but in time, it will be an issue...
Resist the temptation to place plaques honoring donors aboard the submarine. Find a very nice spot ashore. The reason is simple -- if you're successful, and you should be, the boat will be covered with "thankyou" plaques in time and the historic fabric will be covered and altered. There is one "Honor Roll" plaque aboard COD, placed there before we understood fully what was best for COD. It will soon be moved because it covers the spot where COD's builder's plaque was mounted and I am working on getting it replicated.
You should honor your donors, but remember, in 10 or 15 years you will need to repaint, sandblast, etc., and having a boat already covered in plaques makes the new ones less visible... This is an issue with other, older ships that have gone through many donor "cycles" -- its best if you have a wall of honor elsewhere.
Me, personally, I am working on the opposite side of the coin -- I'd like to have a wall of dishonor for the president of a local foundry company who told his manager to NOT help USS COD make a replica builder's plaque!!!
It might be floating in the blue water inside our PortaJohns!
PF