During World War II, Waldemar Semenov (a retired merchant seaman) was serving as a junior engineer aboard the SS Alcoa Guide when a German submarine surfaced and opened fire on the ship. The US merchant ship was hit, caught fire, and began to sink. Three hundred miles off the coast of North Carolina, Semenov and the other sailors lowered lifeboats into the water. Fortunately, the lifeboats were equipped with a compass. Semenov and his crew used the compass to sail west by northwest toward the shipping lanes. After three days, a patrol plane spotted Semenov’s lifeboat and the USS Broome rescued the men the next day. Thanks to that compass, Semenov and 26 other crewmembers were saved.