Ships hit by U-28
See the profile page for U-28
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | ||
| 14 Sep, 1939 | U-28 | Günter Kuhnke | Vancouver City | 4.955 |  | br | ||
| 17 Nov, 1939 | U-28 | Günter Kuhnke |  | Sliedrecht | 5.133 |  | nl | |
| 25 Nov, 1939 | U-28 | Günter Kuhnke | Royston Grange | 5.144 | | br | SL-8B | |
| 21 Jan, 1940 | U-28 | Günter Kuhnke | | Protesilaus (t.) [Mine] | 9.577 | | br | |
| 9 Mar, 1940 | U-28 | Günter Kuhnke | | P. Margaronis | 4.979 |  | gr | |
| 11 Mar, 1940 | U-28 | Günter Kuhnke | | Eulota | 6.236 | | nl | |
| 18 Jun, 1940 | U-28 | Günter Kuhnke | | Sarmatia | 2.417 |  | fi | |
| 19 Jun, 1940 | U-28 | Günter Kuhnke | | Adamandios Georgandis | 3.443 | | gr | |
| 21 Jun, 1940 | U-28 | Günter Kuhnke | HMS Prunella | 4.443 | | br | ||
| 27 Aug, 1940 | U-28 | Günter Kuhnke | Eva | 1.599 |  | nw | SC-1 | |
| 28 Aug, 1940 | U-28 | Günter Kuhnke | Kyno | 3.946 | | br | HX-66 | |
| 9 Sep, 1940 | U-28 | Günter Kuhnke | Mardinian | 2.434 | | br | SC-2 | |
| 11 Sep, 1940 | U-28 | Günter Kuhnke | | Harpenden (d.) | 4.678 | | br | OA-210 |
| 11 Sep, 1940 | U-28 | Günter Kuhnke | | Maas | 1.966 | | nl | OA-210 |
| 26 Oct, 1940 | U-28 | Günter Kuhnke | Matina (d.) | 5.389 | | br | ||
| 66.339 | ||||||||
| 13 ships sunk (56.272 tons) and 2 ships damaged (10.067 tons).
[Mine] indicates the vessel was hit by a mine laid by said U-boat.
| ||||||||