[GoldenRivet]

Additionally, for diving, you can view this video, and you will observe wat appears to be water jets at :17 through :19, this is the forward main ballast tank vents opening and all of the air with sea water mist escaping as sea water floods the MBT. the view changes to the aft section of the sub... here you can see at :22 through about 1:15 another "water jet" which is air and mist escaping from the aft ballast tank vents as sea water floods the tanks. the fuller the tanks get, the deeper the sub goes. dive planes which are not shown in this video have little bearing on the actual process of diving or surfacing, except that is to speed up the process.


For surfacing if you look at this you can see a sub surfacing, where in the video you can see streams of water pouring out of the tank vents as high pressure air is still forcing water out of the tanks.