I like your film. It looks like fun and a way to get hooked into doing bigger and better films. I never had the initiative that you have, although we didn't have the technology of today back in the horse and buggy era when I was a kid. You know, they have those videos on youTube now where guys metal detect in a stream and use cameras in waterproof cases to see the action under water, that would almost be like diving on a wreck for real! And if you have a creek near your house that doesn't have shipwrecks or treasure on the bottom, you can still do movies with ships sinking in the creek.
We took our old plastic airplane models (and a flying balsa 1 time) and spay lighter fluid on it and toss it off the Tallahatchie bridge t recreate one going down in flames.
I took some of my old plastic ship models down to the lake behind the house and did something similar except I had firecrackers taped inside the hull so there would be explosions. I only went through with it once or twice; parents just don't get how cool explosions are when you're sinking the Graf Spee. That whole area is silted up now as well as the area behind the next couple of houses too. No one would ever know that a warship went down years in the past, however, I think I was required to make sure there wass no wreckage left behind.
Yup in the process of filming the rising of the ship film will be about 2 minutes long. But before we raise her. we will do another dive on a mysterey Confederate ship! Or Sub!