The U.S. Coast Guard launched an aerial search on Monday afternoon for an elderly man who is believed to have fallen overboard from a cruise ship traveling from Monterey to San Francisco. As of about 5:40 p.m., the man had not been located and the Coast Guard was in active discussions to suspend the search unless new information was received, according to Coast Guard spokesperson Loumania Stewart. The first air crew was dispatched from Sacramento aboard a C-27 aircraft at about 3 p.m. to search an area about 45 miles off the coast of Monterey. Another Coast Guard crew was sent from San Francisco aboard a helicopter at about 4 p.m., Stewart said. The man was aboard the Ruby Princess, a 951-foot-long cruise ship owned and operated by Princess Cruise Lines Ltd. The ship is 195 feet high at its tallest point. It has 19 decks and has about 900 balconies, according to the company’s website. The ship can hold 3,080 passengers and 1,200 crew. A spokesperson for Princess Cruises did not immediately return a request for comment.