Nummer: 16405a
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 29.04.1943 |
| Time of attack : | 09:24 |
| Nationality of U-boat : | German |
| U-boat : | U 258 |
| Commander : | Mäßenhausen |
| Grid : | AD 7852 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 4000 BRT |
| presumed result : | damaged |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | ONS.5 |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Footnote : | U-258 reported hits on three ships of 4-6000 gross tons. Later a damaged ship was sunk by two coups de grâce. "McKeesport" was hit by only one torpedo, the others detonated ouside the convoy. |
| related attacks : | Angriff 1 Angriff 2 |
| Convoy : | ONS.5 |
| Route of convoy : | United Kingdom - North America (slow) |
| Remark to convoy : | 2nd series: Apr 1943 with new numbering (counter traffic SC) |