You obviously haven’t done your research. Sub bottom profiling has nothing to do with the amount of treasure a ship had. It locates the wreck regardless.

National Geographic funded an project to find a slave ship, and it was located.

Several wrecks have been located when the only purpose was to study the layers of Earth beneath the seabed.

Now a novice might go after a Spanish Galleon, but real salvors know Spain will lay claim to the vessel and any chance of getting a finder’s fee is somewhere between slim and none.

If your looking for treasure only, try using a sensor(s) that detects non ferrous metals.

I hope this helped.

I know, I know, SOON it’s all gonna change with Tinkerbell 2.0. You just won’t impose a deadline.

Amusing