Title says it all. Well, not really.
The gamemode has the "carrying materials" system of Honormining with the build variability of the Salvage Mod. It all takes place underwater. You can buy oxygen tanks to stay under longer, or even make your own out of materials you've salvaged. Same with pressurized suits; they let you go deeper. So would anyone like to contribute, either a shipwreck or an actual ship? I am accepting full ships because I can half-bury them myself.