Base Strike is the longest and most powerful of the three tech trees. It focuses on winning naval battles with the help of Carriers. It offers the best CV and DD positioning by far, and the best CV strike efficiency. It also has a convoy raiding bonus (although weaker than SLI), and the convoy escort + ASW bonus (although slightly weaker than FIB). The tree ends in 1947 (or 1952 of you consider the semi unrelated amphibious bonus). It will always have the best CV and DD positioning bonus. CVs are the key to naval victory, and therefore this doctrine tree is the key to naval supremacy.
Note that even though Carriers receive snow, rain and misc bonuses, this will not make them effective in bad weather. They are still sitting ducks when it's snowing.