Where is the depth charge in porgy?

[Tiny Messiah]

I'm trying to grab all the secrets in the starting area to make this less of an annoying slog, this game is weirdly frustrating

[artofwar]

The depth charge is the boat wreckage in the southwest of the first map.

To get to it, you need to go down into the second map, then all the way to the left, and then back up into the first map. You also need the missile item to break some rocks to get into the boat.