Air searches were begun immediately after 14 October, her scheduled date of arrival. Widely scattered oil slicks with occasional debris were found. Subsequently, the Board of Investigation held in Guantánamo Bay, and the more formal Naval Board of Inquiry held at the Washington Navy Yard, found that the "widely scattered oil slicks" were actually oleous in nature and not bunker oil or fuel - most probably rotting vegetation like seaweed. All of the "occasional debris" was determined not to have come from "Dorado".