Submerged controllability problems associated with the ever increasing size of USN submarines led the force to adopt bow diving planes for the first time in this class.

The small conning tower fairwater (also known as a sail) initially precluded any sort of bridge structure for surface cruising.

For extended surface runs, a temporary piping-and-canvas structure was erected to give the topside watchstanders some protection from the elements.

Starting in 1918-1919 using lessons learned from overseas experience, U.S. submarines had bridges more suited to surfaced operations in rough weather.

[9] The E-class and similar early submarines were known as "pig boats" due to foul living quarters and unusual hull shape.