Ultimately shown to be unsuccessful, no other submarines of this class were built, although future advances in construction and metallurgy science made the double hull design a standard one for the USN.

Due to the boat's still fairly small size the tankage space was very tight and difficult to maintain.

It also resulted in a complicated venting and flooding arrangement that at times led to an uneven distribution of ballast water.

[5][6] To save weight in the pressure hull the structural strength was reduced, making her test depth only 150 feet (46 m).

[7] M-1 was built with the same armament and speed as the preceding L-class, but she was larger due to the double hull design.