withdrew without picking up any of the survivors. The ship was later identified as a German blockade runner named Rio Grande. Marblehead was able to rescue 72 survivors later on 8 January. Omaha returned the following day to the vicinity that Rio Grande had been sunk and again encountered an unknown merchant steamer. She once again challenged the unknown contact with her searchlight, and again received no response to her signals. This time Omaha fired two warning shots over the unknown ship's bow, due to the fact that it appeared that she was dead in the water. An explosion was observed, followed by smoke billowing from her. Captain Elwood M. Tillson ordered Omahas 6-inch battery to train on the unknown contact and open fire. Captain Tillson then allowed members of the crew to rotate topside to observe the gunfire since many of the men were unable to view the action against Rio Grande the previous day. The ship, later identified as another German blockade runner, Burgenland, sank by her stern thirty minutes later. Two days later 21 of her survivors were rescued by Davis with able to retrieve an additional 35 crewmen on 8 January. Recovery of U-177 survivors Omaha was out patrolling with Memphis and Jouett on 6 February 1944, when the ships were given orders to be on the lookout for the survivors of a U-boat that had been sunk earlier in the day near their location. A yellow life raft was later spotted by Omahas lookouts. The occupants were German sailors that had survived the sinking of their boat, , that had been sunk by a Consolidated PB4Y-1 Liberator from Bombing Squadron (VB) 107 that was operating out of Ascension Island. U-177 had been sitting on the surface while some of the crew were sunning and swimming. According to Leutnant zur See Hans-Otto Brodt, their commanding officer Korvettenkapitän Heinz Bucholz and another 50 men of the crew of 64, went down with the ship. The prisoners were sent to the sick bay for treatment of shock and exposure and supplied with fresh clothing that had been provided by the Red Cross. Until Omaha put in at Bahia, on 15 February, where they debarked and were transported to Recife, the Germans were placed under armed guard. Transfer to the European Theater On 4 July 1944, Omaha got underway to the European Theater with destroyer escorts , , and