[Blacklight]

I want to try Dangerous Waters and SH4.

Great choice with Dangerous Waters. I suggest SH3 with the GWX 2.0 mod. It's much better than SH4 and theres much more of an "adventurous" feel to it. SH4 just isn't the same.

May I also suggest Harpoon Commander's Edition from Matrix Games.

http://www.matrixgames.com/games/game.asp?gid=325

Also Harpoon 3 Advanced Naval Warfare, but that game is nowhere near as user friendly as Commander's Edition. There are some differences such as Advance Naval Warefare having multiplayer more accurate targeting of individual targets (like buildings in bases and such (Not to mention a few bugs that they're working to patch up)
http://www.matrixgames.com/games/game.asp?gid=323

I've played them both and enjoy them equally.

and also Distant Guns (By Storm Eagle I believe). They are coming out with a sequel to Distant Guns called Jutland as well.

http://www.stormeaglestudios.com/pub...stantguns.html

For miniature tabletop games that will teach you more about naval warefare just from reading the game manual than most any book, check out Harpoon4, Command at Sea(This comes bundled with their game sets Rising Sun, and Supermarina I), and Fear God & Dreadnought by Clash of Arms Games. They cost a bit, but then considering that the rulebooks are pretty much manuals that teach pretty much EVERYTHING about naval warefare, they are a great read even if the game itself never hits your tabletop or floor. I've learned more about naval warefare from reading those manuals than I have reading all the books about naval stuff I've ever read.
http://www.clashofarms.com/harpoon4.html

http://www.clashofarms.com/risingsun.html

http://www.clashofarms.com/supermarina1.html

They are also coming out with this soon..... *drool*
http://www.clashofarms.com/AtlanticNavies.html
I can't wait to wage the "Battle of the Atlantic" on the floor of my living room !

For cardboard board game naval games that are pretty easy to learn and get started on, I suggest "The Great War at Sea" series from Avalanche Press LTD. There are several of them in the series and they are all good and relatively easy to learn for a board wargame. They have some nice mechanics and are a lot of fun to play.

http://www.avalanchepress.com/line_GWAS.php