thank you all so far for your efforts .

smoke from a plummers thingy was mentiond this is not suitable as all i want the smoke for is to replicate the guns going of from a battle ship.
the smoke for the funnel is coverd i got the idea to use a fog machine muhaaaaaa loads a smoke.allthough this maybe usfull fur the sinking ship thank you .
depth charge i though of baking soda and vinegar but its got to be on the boat until needed ,so, does anyone no if baking soda can be kept in a small tin and sank over the side if this would make an effect im after .?
keep them ideas comming all help is greatfully recived

