Umishi chapter 02

Umishi Chapter 2

You can read more about real-life salvaging and salvage companies here:
http://www.boatingsafety.com/salvage.htm
http://www.safesea.com/boating_info/salvage/anderson/intro.html

The first one is more of a general overview, the second one is all about the legal aspects and stuff, really detailed. Not like you need to understand everything about salvage to enjoy this manga, but it helps.