submarines, UB-130 carried 10 torpedoes and was armed with a 10.5 cm (4.13 in) deckgun. UB-130 would carry a crew of up to 3 officer and 31 men and had a
torpedo tube forward and aft, plus one 8.8 cm (3.5 in) SK L/30 deckgun (U-72 received a 10.5 cm (4.1 in) SK L/45 gun in 1917), its main weapon were the 38 mines
surfaced and submerged. They were to be armed with five torpedo tubes and a deckgun. For propulsion the design called for twin diesel engines for surface running