The U-class submarines were designed in 1935 for the Royal Northport Navy as equivallents for the type VII/T class submarines. The design was intended to raid one enemy U.K. freighters and participate in wolfpacks with the german flleet. In 1942 the revolution caused a change in the objective of the class, now hunting axis vessels trying to suply the loyal troops backed by Germany
and Italy. In 1943 with the whole country liberated the submarines spearheaded the charge agnaist all enemies of the folk, torpedoing ships in all naval fronts both in Europe and the Pacific.
In late 1944 job began to modernize part of the class with tecnology obtained by espionage on the type XXI class. This modernized submarines had an upgraded ASDIC and could operate with acoustic and wire-guided torpedoes and some even had snorkel. This modernized subs entered too late to serve in WWII.
For identification, all submarines had painted two red stripes (one on each flank) and carried a red rebel flag.

----------------------------------------CONTROLS------------------------------------------
AG-1 arms the front torpedo tubes (Straight runner loaded)ç
AG-2 arms the wire guided front torpedo tubes (Control with Yaw)
AG-3 arms the rear torpedo tubes (Straight runners)
AG-4 allllows to operate the deck gun (Rocket group to fire, VTOL/ Trim to aim)
Dive with VTOL, under 50 ft weapons will disapear (cause F* the logic-SP)
Trim will raise and lower all masts.

dagye fyent! (good hunt)

P.S. Sorry for bad drawing skills