Patrol info for U-77
| Departure | Arrival / Fate | Duration | ||
| 3 Mar 1943 | La Spezia | 28 Mar 1943 | Lost | 26 days |
Commander | Officers * |
 Oblt. Otto Hartmann |
Daily positions, sinkings and allied attacks during the patrol of U-77
Legend
means a ship hit (sunk or damaged).
indicates an Allied attack on the boat.
shows the loss of the U-boat.
The route is shown in a red line. You may have to zoom out to see all data.
In some cases missing data may make the route appear go overland which U-boats of course never did on patrols.
Left click to zoom-in and right-click to zoom out.
We have daily positions for all 26 days on this patrol.
Departure from La Spezia on 3 Mar 1943.
4 Mar 1943 - 5 Mar 1943 - 6 Mar 1943 - 7 Mar 1943 - 8 Mar 1943 - 9 Mar 1943 - 10 Mar 1943 - 11 Mar 1943 - 12 Mar 1943 - 13 Mar 1943 - 14 Mar 1943 - 15 Mar 1943 - 16 Mar 1943 - 17 Mar 1943 - 18 Mar 1943 - 19 Mar 1943 - 20 Mar 1943 - 21 Mar 1943 - 22 Mar 1943 - 23 Mar 1943 - 24 Mar 1943 - 25 Mar 1943 - 26 Mar 1943 - 27 Mar 1943 - 28 Mar 1943 -
Ships hit by U-77 during this patrol
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | ||
|---|---|---|---|---|---|---|---|---|
| 16 Mar 1943 | U-77 | Otto Hartmann |  | Hadleigh (t.) | 5,222 |  | br | ET-14 |
| 16 Mar 1943 | U-77 | Otto Hartmann | | Merchant Prince (d.) | 5,229 | | br | ET-14 |
| 10,451 | ||||||||
1 ship sunk (5,222 tons) and 1 ship damaged (5,229 tons). Legend | ||||||||
General Events during this patrol
We have no events listed for this patrol.
Add more events! If you know of an interesting event either missing from this date or an upcoming event that you'd like to share please contact us. We continuously update these databases.
Attacks on U-77 during this patrol
28 Mar 1943
The sinking of U-77
At 11.25 hours, the boat was spotted by a Hudson Mk.VI (48 Sqn RAF/L, pilot F/O J.B. Harrop) on patrol east of Cartagena in position 37°42N/00°10E and immediately crash-dived when the aircraft attacked, dropping depth charges just ahead of the swirl. Oil and bubbles could be seen on the surface and in fact water entered through a serious leak in the diesel engine room, forcing U-77 to surface later and left her unable to dive. Hartmann reported his situation to the FdU while heading towards Toulon and was instructed to enter the neutral Alicante for repairs under international maritime law. U-380 (Röther) was ordered to meet the boat to take off most of its crew to avoid internment in Spain, but the Hudson Mk. IIIA T9430 (233 Sqn RAF/L, F/O E.F. Castell) found U-77 earlier between Cabo San Antonio and Ibiza at 17.45 hours. The boat was attacked with four depth charges despite of fierce AA fire, strafed with 3000 rounds in several runs and a single A/S bomb was dropped that exploded 15 yards behind the stern – the pilot was later awarded the DFC. At dusk, the badly damaged boat managed to escape further attacks and headed for Alicante, but during the night both electrical engines broke down and the immobile U-77 began to settle, sinking at 01.15 hours on 29 March south of Cape Nao, Spain – the wreck was located in a depth of 80 meters in 38°33.334N/00°14.875E. All crew members abandoned ship in one rubber dinghy and some makeshift rafts made from deck planks, but the commander and 37 crew members died of exposure or drowned, only nine survivors were found several hours later by a Spanish fishing vessel from Denia, landed at Altea on 30 March and eventually repatriated. 36 bodies washed ashore and were buried in Spain, the commander and four men in Altea and 31 in Calpe – in 1983 they were reinterred at the cemetery at Cuacos de Yuste, Provincia de Cáceres, Spain.
About this data
If you believe we have missed an attack on a German U-boat in this listing please let us know.
See all patrols for U-77
* These are officers that later became commanders themselves.
Return to U-boat Patrols main page