Nummer: 03213
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 17.10.1940 |
| Time of attack : | 03:17 |
| Nationality of U-boat : | German |
| U-boat : | U 93 |
| Commander : | Korth |
| Grid : | AE 8783 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 6000 BRT |
| presumed result : | damaged |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | OB.228 |
| Date of observation : | 17.10.1940 |
| Nationality of target : | Norwegian |
| Actual type of target : | Steam Freighter |
| Name of target : | Dokka |
| Year of launch : | 1925 |
| Actual tonnage : | 1168 BRT |
| Actual result : | sunk |
| Position of target : | 60.46n 16.30w |
| Footnote : | During three attacks against two convoys, U-93 missed the targeted ships, but hit other ships in the convoys (see p.32 note 3 and 5). |
| Convoy : | OB.228 |
| Route of convoy : | Liverpool - North America (out) |
| Remark to convoy : | Sep 1939 to Jul 1940 via South Ireland, Jul to Okt 1940 via North Cannel, then ON. |