Just remember that the book is basically a novelization of the computer game, which probably explains the odd episodic nature, wierd weapon restrictions (come on, they are the ONLY sub operating in the area yet the tender restricts their torpedos??), and ridiculous body count. I'm not a huge sub guy, but even I could tell the tech was vastly overblown. I don't recommend this book at all unless you just want to complete the Tom Clancy portion of your library