Dice in an enclosed clear container with a flat bottom allows easy rolling.
Our dice rolling boxes are Pelican 1100 (*not* 1100i) cases, good to 50', and Otter Box 1000 cases (good to, what, 100'?). The Pelicans are perfectly adequate for this, as you'll have to be shallow to get some good dive time in.
Calculators in waterproof bags and a slate to write current bank balance with any transactions added/subtracted as they occur. No paper money needed.
Calculators in waterproof bags might be a bit hard to use, but you don't really need a calculator, anyway. A slate or magnadoodle board is good enough (since you're not going to be very narced at the shallow game depth). The idea of using a slate for bank balances works well -- just consider it "electronic banking", eh?
Laminated cards for Community Chest and Chance
I would also suggest a container for Chance and Community chest cards, which can be opened, cards played and closed with the deck in after each usage.
This can probably be best handled by the original ScubUNO card management system: rings. Laminate the cards and string them on "draw rings". When you get one, you flip the next card over and there you have it. For "get out of jail free" cards, a note could simply be added to the banking slate.
The way I do the waterproof lamination, I cut the corner off the cards, laminate them, cut them out (being sure to leave enough lamination to have a stable seal), and then punch the hole in the plastic at the missing corner. If you just laminate them and punch the hole through the card, you'll have water seepage through the paper, shortly destroying the card.
Magnetic player pieces and a stainless printed board. Board has rents, etc on the actual property spaces, and coded magnetic markers to indicate who owns a specific property eliminates need for property "Deeds"
I would suggest a custom made board - denser than the cardboard ones and larger too. Maybe a piece of perspex, with the markings drawn on, the relevant property cards stuck to the board and covered in laminate film/a clear sheet of perspex. Then lead weights could be attached to achieve negative bouyancy.
The magnetic idea is interesting, but ferromagnetic stainless is expensive and less corrosion resistant than the steels backplates are made of. Additionally, it would either be quite flimsy (and possibly sharp) or quite heavy. It'd likely work wonderfully for a pool game, but perhaps not so great for an open-water game. Having loose magnetic pieces might be a bit harder to manage, and you can lose them, perhaps too easily.
The clear plastic custom-made board sounds intriguing to me. With the property information "built in" to the properties themselves, life gets a little easier. Add in markings at the top for owner, houses/hotel, and mortgaged, and you've got the general requirements for each space. The Chance and Community Chest rings, and perhaps even the dice box, could be attached to the board by lanyards to prevent loss, even if playing a mid-water drift game.
Instead of pieces, you could use "grease pencils" to write directly on the plastic board. That would cover all the property information and player locations, and if the board was big enough, you could simply write the "bank" in the middle. If you wanted to save the state of the game at any point, you could just take a picture of it. (Put a star or something by the player who rolls first when you get back to depth.) If you're *really* into it, you could have a "team" game -- then if you don't get the same players back the next pool night, you could still continue the game. :biggrin:
You would need to play this game in dry suits or in warm water as heat loss when lying around a board for a long time could be pronouced.
A friend and I had a 2:47 (i.e. 167-minute) dive playing ScubUNO, Go Fish, and all sorts of other games (even a scuba variant of a gin-rummy-like game). It's not too bad if the temperature is warm enough. (The depth profile my computer logged from that dive is about the squarest dive profile I've ever seen. :biggrin