Yea but they could probably cut the sail's height down by six or seven feet by removing it, which is a good idea for a diesel sub which might spend a lot of time on the surface i.e. low radar cross-section and smaller silhouette. I guess it comes down to weather you want a comfortable bridge crew or a better surfaced sub- US Submariners used to hang from the Periscope shears to get a better view of the surrounding ocean, so I guess you can figure out where our priorities are.
