not contain any oil; however, the resulting explosion blew away the deck house and the radio room and knocked down the forward mast. An order to abandon ship was given and four lifeboats were launched. Seeing that the ship did not sink, the submarine proceeded to fire eight or nine shots at the hull of the stricken tanker. One shot hit the bow and blew it away speeding the tanker's sinking. At about 06:30 the ship started sinking rapidly and by 06:45 went completely under. The lifeboats were shot at by what appeared to be rifle fire from the submarine without injuring anyone. Three of the lifeboats containing thirty-three survivors were picked up by dispatched tug boats and landed in Cayucos. One lifeboat with the master in it reached the shore near San Simeon where it was wrecked. Everyone was saved by the watchers on the shore. Wreck and its cargo In an expedition conducted on November 7, 1996, the submersible Delta descended with two men on board to the wreck at a depth of and found Montebello sitting upright on the bottom. Based on their observations it was concluded that a single torpedo hit Montebello just forward of the pump room. While the bow was broken from the impact with the sea floor, the overall condition of the wreck was thought to be quite good, giving rise to the concern that she could still hold her liquid cargo. When she went down, Montebello held of crude oil along with of fuel oil for her engines. In August 2010 the wreck was examined by a robot submarine from the Monterey Bay Aquarium Research Institute to determine whether the oil cargo was still on board and whether it posed a possible environmental threat. The expedition created three-dimension images of the ship using sonar, to be analyzed onshore. Jack Hunter, an archaeologist for Caltrans who examined the wreck in 1996 and compared the images from the 2010 expedition expressed concern that the wreck had deteriorated over the past 14 years and could represent a risk if the cargo leaked. Further explorations of the wreck were scheduled for 2011 at an expected cost of $2.3 million, to be paid from a fund which oil companies pay into for such situations. After two weeks of extensive testing in October 2011, researchers determined that no crude oil remained in the tanker and such oil most