What sort of weapons do the ships use?
Our club models naval surface warfare using CO2 powered cannons firing BBs at 150 PSI or less
Can you use mines and torpedoes?
No. However, our rules do allow (optional) the smaller ships, which relied more on torpedoes, to simulate the larger damage by utilizing a BB cannon without an interruptor pin that "spurts" out the entire magazine (only 15 BB's instead of usual 50) in a single blast.
Can you ram another ship?
Ramming happens (especially in the excitement of battle) but not intentionally. A captain who rams and damages/sinks another ship is assigned a penalty.
Could I build a carrier and launch RC aircraft?
Aircraft at our scale would have a wingspan of just a couple inches, so fairly difficult (and arming anything that small...). However, we do sometimes play a "convoy" battle where each team also sails aircraft carriers, freighters, and other unarmed ships and must balance attacking the other team's convoy ships while protecting its own.