[3] On her first patrol off the northern coast of Norway, on 9 December 1941, U-134, under the command of Kapitänleutnant Rudolf Schendel, attacked a four-ship convoy and sank the 2,185 GRT German merchant ship Steinbek.

[4] On her second patrol off the coast of Norway, on 2 January 1942, U-134 sank the British cargo ship Waziristan of Convoy PQ 7a, carrying 3,700 tons of military supplies, including 410 Ford trucks, for Russia from New York.

On her seventh patrol to the central Atlantic, on 14 November 1942, U-134 sank the 4,827 GRT Panamanian steamship SS Scapa Flow that carried manganese ore, latex and baled rubber.

At 4:58 pm the steamer, under the Master, Samuel Newbold Mace, was hit on the portside under the bridge and at the third hatch by two torpedoes and sank in one minute at position 12°N 30°W / 12°N 30°W / 12; -30 in the Atlantic Ocean.

United States Navy doctrine required blimps to stay out of range of surfaced submarines and guide aircraft or ships to attack.

[7] The blimp's pilot, Lieutenant Nelson C. Grills, USNR, disregarded this doctrine in an attempt to prevent U-134 from reaching a tanker and freighter ahead of the submarine.

[7] K-74 returned 100 rounds of .50 caliber (12.7 mm) fire before the machine gun was unable to depress sufficiently as the blimp passed over U-134 on its bombing run.

[7] Aviation Machinist's Mate second class Isadore Stessel drowned after being attacked by a shark, just minutes before rescue, and became the only United States Navy airshipman to die as a result of enemy action.