Nummer: 06303c
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 23.08.1941 |
| Time of attack : | 05:25 |
| Nationality of U-boat : | German |
| U-boat : | U 564 |
| Commander : | Suhren |
| Grid : | CG 2783 |
| presumed target type : | Corvette |
| presumed result : | sunk |
| Number of torpedoes/mines : | - |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | OG.71 |
| Date of observation : | 23.08.1941 |
| Time of observation : | 04:28 |
| Nationality of target : | British |
| Actual type of target : | Corvette |
| Name of target : | Zinnia (K.98) |
| Year of launch : | 1940 |
| Actual tonnage : | 925 ts |
| Actual result : | sunk |
| Position of target : | 40.16n 11.10w |
| Footnote : | U-564 fired three single shots and observed an ammunition ship sinking immediately and another ship sinking shortly afterwards. The corvette exploded. The B.d.U. assumed three ships of 20.000 gross tons sunk and four ships of 20.000 gross tons damaged. In addition one corvette was assumed sunk. |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | OG.71 |
| Route of convoy : | United Kingdom - Gibraltar (out) |
| Remark to convoy : | Sep 1939 to Jul 1940 via South Ireland, Jul 1940 to Aug 1943 via North Channel; later KMS. |
| updated on: | 07.04.2025 |
| Remark: | POSITION |
| Changes: | 00.02.2002 Bachmann/242: ZINNIA Tonnage 925ts 07.04.2025 Laut ADM 199/1142/39 Versenkungsposition 40.16n 11.10w |