Nummer: 00701
| Area : | Western Area |
| Sea area : | North Sea |
| Date of minelaying : | 05.11.1939 |
| Nationality of U-boat : | German |
| U-boat : | U 21 |
| Commander : | Frauenheim |
| Grid : | AN 0537 |
| presumed target type : | --- |
| presumed tonnage : | ---- --- |
| presumed result : | hit not ascertained |
| Used weapon(s) : | Sea mine(s) |
| Date of sinking : | 21.11.1939 |
| Nationality of target : | British |
| Actual type of target : | Light Cruiser |
| Name of target : | Belfast (35) |
| Year of launch : | 1938 |
| Actual tonnage : | 11500 ts |
| Actual result : | damaged |
| Position of target : | Firth of Forth |
| updated on: | 25.06.2018 |
| Remark: | KTB U21 |
| Changes: | 1) 23u44-00u53 AN0537 9 TMB im Firth of Forth 56.07,1-56.04,1n 02.58,3-02.57,6w |