11 Mar 1942
At 21.26 hours, the boat was forced to dive by gunfire from HMS Lamerton about three miles ahead of the convoy PQ-13. Four attacks with 25 depth charges were then carried out by this destroyer and HNoMS Newport and the U-boat kept submerged until darkness. U-593 escaped with minor damage. (Sources: Ritschel/ADM199-1782)

12 Mar 1942
At 12.06 hours, the boat crash dived when attacked by a British Hudson aircraft (224 Sqdn RAF/E) in the vicinity of convoy PQ-13. U-593 was not damaged by the three 250lb depth charges dropped ahead of the diving U-boat. (Sources: Ritschel/ADM 199-1782)

12 Nov 1942
The boat sank the British freighter Browning and was hunted for 16 hours by Allied escorts for her efforts. She nonetheless escaped. (Clay Blair, lists this in his book as the U-595 but U-593 sank the Browning) (Sources: Blair, vol 2, page 99)

19 Apr 1943
At 09.37 hours, the boat was bombed and damaged by a Hudson aircraft (RAAF-Sqdn 459) in the Mediterranean. (Sources: Rohwer)

5 Aug 1943
At 14.55 hours, the boat was attacked by 3 American P-40 Warhawk fighters (USAAF, 325th FG) off Sardinia in the Mediterranean. The boat suffered a number of machine gun hits in the bridge area and returned to Toulon 3 days later. (Sources: Book "Checkertail Clan, the 325th Fighter Group in North Africa and Italy": pages 28-29.
Dr. Axel Niestle via e-mail on 23 April, 2006.)

3 Nov 1943
After U-593 sank Mont Viso in convoy KMS-30, she was forced to dive when another ship of the convoy opened fire at her. The U-boat then reloaded the torpedo tubes, but at 02.30 hours was located when returning to periscope depth by HMS Bryony which was picking up the survivors behind the convoy. The corvette immediately dropped eight well aimed depth charges and was shortly thereafter joined in the hunt by HMS Haydon. However, they could not regain contact and soon rejoined the convoy. U-593 inadvertently fell to a depth of 220 meters and was later forced to break off the patrol due to leakages and problems with the torpedo tubes. (Sources: KTB U-593/ADM 199-976)

13 Dec 1943
At 00.30 hours the boat was attacked by Wellington aircraft MP816 (36 Sqdn RAF/B, pilot F/O C.F. Parker) northeast of Bone during the Swamp operation that followed the sinking of HMS Tynedale and HMS Holcombe by U-593 on 12 December. The aircraft approached the U-boat after a radar contact but the Leigh Light failed and it was hit in the port wing and tailplane by very accurate AA fire. The rear gunner fired 600 rounds at U-593 and a sighting report was made that led to her sinking by the US destroyer USS Wainwright and the British escort destroyer HMS Calpe. The damaged Wellington landed safely at Bone. (Sources: Franks/Zimmerman)

7 recorded attacks on this boat.