Artillery operation with range = 1200 meters, target against the bright western horizon. With a total of 19 shots observed 7 hits with the 10.5 cm, of which the 3rd shot caused fire and demolition of the bridge. 6th and 7th hits in the stern starting fires. After the 3rd hit immediately bright fire over the entire deck. Cargo of heavy oil runs out and also catches fire on the water. Tanker burns from bow to stern with explosions, the sea around him burns. No lifeboats seen. Tanker breaks with explosions behind the bridge, bright tongues of flame, while running off very heavy smoke observed from the direction of the oil fire on the water.”
Heyse was not the only one elated at his successful patrol. At 4:31 pm on Friday the 6th of March, as the men from the Knudsen are struggling to rendezvous on the wide sea in two different boat, U-128 receives the following signal from U-Boat headquarters: To Heyse. Kptlt (Ing.) Noack on 1 March is promoted in rank. Heartiest congratulations. Flotilla Commander.” The Commander of the Second Flotilla (Front) Kapitän zur See Viktor Schütze in Lorient would be sending more promotions and laurels over the airwaves soon.
U-128 was not idle. At 9:10 the sub headed south-southeast at 120 degrees, then 20 minutes later turned west to 250 degrees, then at 9:30 am came to northwest 290 degrees, trying to line up a fifth shot on its quarry. Operating under both electric motors it finally lined up a shot and fired at 9:42, from such close range (500 meters or about 1,600 feet) that the projectile struck the ship the same minute.
The task of entertaining the 35 members of the O. A. Knudsen’s crew that were not hospitalized was eagerly undertaken and without giving the men much time to rest. “Tanker Survivors Entertained,” crowed the Nassau Guardian: “The survivors from the tanker who went [ashore] on Sunday were entertained yesterday afternoon [Monday 9th March] at the Masonic Hall by the Imperial Order of the Daughters of Empire. [The show] was greatly enjoyed by all present.” (Nassau Guardian, March 10th, 1942 – heavy use of italics is due to illegibility of the microfiche).