The A&A Europe 1999 ed had a Special cash advance rule that I liked a lot. The Bank made a one-time disbursement of 12 IPC, that the players could spend or save as they wished. Lets take this one step further by making it hidden.
This rule could be used in all A&A games, but since it probably skew the balance, it is not fit for tournament play, but could be fun in casual f2f games in your basement if you are fed up of the OOB same moves every game issue.
1. Set up all units as usual, according to the set-up chart.
2. Axis get 24 IPC to share, and Allies get 24 IPC to share. This is a one-time disbursement before Turn 1. Add the bid.
3. All players wrote down on paper what units they purchase, and where they are mobilized. The units can be mobilized in any friendly territory and not-hostile seazone.
4. All players simultaneous turn their papers face up, and place their units on map. Of course enemy ships can share the same seazone, it just get hostile, and trigger a combat in T1.
5. Now start to play the game as usual.