the submarine had a maximum surface speed of and a maximum submerged speed of . when submerged, the boat could operate for at ; when surfaced, she could travel at . "u-1305" was fitted with five torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one sk c/35 naval gun, (220 rounds), one flak m42 and two c/30 anti-aircraft guns. the boat had a complement of between forty-four and fifty-two.