U-boat patrols

Patrol info for U-100

DepartureArrival / FateDuration
9 Aug 1940Kiel1 Sep 1940Lorient24 days


Officers *

Kptlt. Joachim Schepke

Daily positions, sinkings and allied attacks during the patrol of U-100

We have 23 daily positions for the 24 days U-100 was at sea.

Ships hit by U-100 during this patrol

Date U-boat Commander Name of ship Tons Nat. ConvoyMap
16 Aug 1940U-100Joachim Schepke Empire Merchant4,864brA
25 Aug 1940U-100Joachim Schepke Jamaica Pioneer5,471brB
29 Aug 1940U-100Joachim Schepke Dalblair4,608brOA-204C
29 Aug 1940U-100Joachim Schepke Hartismere (d.)5,498brOA-204D
29 Aug 1940U-100Joachim Schepke Astra II2,393brOA-204E
29 Aug 1940U-100Joachim Schepke Alida Gorthon2,373swOA-204F
29 Aug 1940U-100Joachim Schepke Empire Moose6,103brOA-204G

6 ships sunk (25,812 tons) and 1 ship damaged (5,498 tons).

We have a picture of this vessel.
(d.) means the ship was damaged.

General Events during this patrol


16 Aug 1940. After U-100 surfaced after sinking Empire Merchant, the boat suddenly dived again due to a handling error and Schepke, standing alone on the bridge, was forced to close the conning tower hatch to prevent the boat sinking. He clung to the periscope standard until the boat resurfaced. Schepke noted in the KTB (War Diary) entry that it must have been a funny sight for the survivors in the lifeboat to see a German U-boat commander in such an embarrassing situation. BdU (U-boat Command) was not amused.

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-100 during this patrol

17 Aug 1940
20.45 hrs, 200 miles NW of Ireland: a destroyer dropped 7-8 depth charges shortly after U-100 located a convoy. The hydrophones were disabled and the boat lost contact with the convoy. (Sources: Ritschel)

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-100

* These are officers that later became commanders themselves.

Return to U-boat Patrols main page