Nummer: 02010b
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 20.06.1940 |
| Time of attack : | 15:54 |
| Nationality of U-boat : | German |
| U-boat : | U 51 |
| Commander : | Knorr |
| Grid : | BF 1983 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 4876 BRT |
| presumed result : | damaged |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | HGF.34 |
| Date of observation : | 20.06.1940 |
| Nationality of target : | British |
| Actual type of target : | Steam Freighter |
| Name of target : | Otterpool |
| Year of launch : | 1926 |
| Actual tonnage : | 4876 BRT |
| Actual result : | target visibly missed |
| Position of target : | SW Ireland |
| Footnote : | U-51 reported two detonations after the attacks against "Andalusian" (reported as "Fellside" by the B-Dienst) and "Otterpool", but no other effects on the ships. The B.d.U. assumed hits on both ships according to the B-Dienst reports. "Otterpool" was really sunk in the evening by U-30. |
| related attacks : | Angriff 1 |
| Convoy : | HGF.34 |
| Route of convoy : | Gibraltar - United Kingdom (home) |
| Remark to convoy : | Sep 1939 to Sep 1942, then MKF und MKS |