Nummer: 26915
| Area : | Indic Ocean |
| Date of attack : | 09.07.1943 |
| Nationality of U-boat : | German |
| U-boat : | U 511 |
| Commander : | Schneewind |
| Grid : | [LY 26] |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 7000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Date unsettled / assumed/ dead reckoned : | 09.07.1943 |
| Nationality of target : | American |
| Actual type of target : | Steam Freighter |
| Name of target : | Samuel Heintzelmann |
| Year of launch : | 1942 |
| Actual tonnage : | 7176 BRT |
| Actual result : | sunk |
| Position of target : | 09s 81e |
| Footnote : | "Samuel Heintzelmann" left Fremantle on Jul.1st, 1943 and was reported missing after Jul.4th at position 20°s / 103°e. Her destination was Colombo. The attack of U-511 was made at her plotted position for Jul.9th, 1943. |