Ships hit by U-603
See the profile page for U-603
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | ||
| 21 Feb, 1943 | U-603 | Hans-Joachim Bertelsmann |  | Stigstad | 5.964 |  | nw | ON-166 |
| 23 Feb, 1943 | U-603 | Hans-Joachim Bertelsmann | Glittre | 6.409 | | nw | ON-166 | |
| 16 Mar, 1943 | U-603 | Hans-Joachim Bertelsmann | | Elin K. | 5.214 | | nw | HX-229 |
| 12 May, 1943 | U-603 | Rudolf Baltz | Brand | 4.819 | | nw | HX-237 | |
| 22.406 | ||||||||
| 4 ships sunk (22.406 tons).
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