1942 Motorcycle Jetski

I was watching a movie clip on Youtube featuring soldiers in the Pacific getting shelled by ships. And I thought that if I were there, I would like to get out there and make those ships quit shooting! For one, because I figure once in the water the shells will be flying over me, not landing on me. But also commando lone wolf valor! And black body paint.

I figure sinking the ships won't be too tough: I have flat magnet-fitted 5-packs of dynamite, very long waterproof fuses and a neat thing that you can click even if underwater and the fuse will light (suggestions on how this thing might work are welcome. 8th?) I will just swim along well below the waterline attaching these things.

But those boats are a long way out, and while personally very buoyant I have not been to the gym, ever. What does 1942 have as regards personal watercraft?

I propose one could first fit a motorbike with snorkels, like I have seen on some Australian cars. I understand these allow the car to ford deep streams etc without flooding the engine with water.

Next: I will remove the rear wheel and attach a propeller. Or possibly fit slats onto the wheel and convert it into some sort of ceiling fan looking propeller. Though that seems a little Gilligan's Island.

Last: I will put a piece of wood over the front wheel spokes, allowing me to use it as a rudder.

This vehicle will travel perpendicular to the normal direction of motorcyle which means the headlight will not be of much use. Probably it should stay off anyway.

Almost forgot: pontoons. One on each side. That way it will float.

I will leave the pontoon bike a safe ways out and then swim to attach the dynamite. Then take the bike to the next ship. Repeat until war finished.