Two pilots have told US investigators that they were going over schedules using their laptop computers in violation of company policy while their Airbus passenger jet overflew their Minneapolis, Minnesota, destination by 150 miles (240 kilometers), the National Transportation Safety Board said Monday. The pilots told investigators that they both had their laptops out while the first officer, instructed the captain on monthly flight crew scheduling. The pilots were out of communication with air traffic controllers and their airline for more than an hour and didn't realize their mistake until contacted by a flight attendant, the board said. Delta said in a statement that using laptops or engaging in activity unrelated to the pilots' command of the aircraft during flight is strictly against the airline's flight deck policies. The pilots acknowledged that while they were engaged in working on their laptops they weren't paying attention to radio traffic, messages from their airline or their cockpit instruments.