While the starter sets and a couple other kits have been available, the full rulebook for Victory at Sea is just coming up for pre-order soon. If you want to get a look inside this repository of all things naval combat, you'll want to check out this preview.
From the article:
The Victory at Sea rulebook will be available to order this Saturday both individually and as part of some fantastic pre-order bundles, designed you to get up and running with the game with the full rule and a sizeable fleet.
Also available will be the Admiral’s Edition. This gorgeous version of the Victory at Sea rules has an exclusive monotone design, silvered page edges, page edges and end papers with ship recognition designs. These are extremely limited, with only 200 hundred copies available. Each copy will also be signed by game author, Matthew Sprange.