Is there a list of upgrade/improved sub effects?
 

I just completed my 3rd patrol in a tambor, and due to my performance was awarded one of the first Gato-class subs. I also was able to get improved SD radar.

Anyone have a list together yet of what improvements I can expect? Like does the Gato dive faster or have a deeper crush depth? Does my improved radar extend the range from 15 to 20 miles or something?

I'm loving the game. Not until patrol 3 did I discover the "Battle Stations" button!:doh: