A certificated commercial pilot may act as pilot-in-command of an aircraft for compensation or hire, as well as carry persons or property for compensation or hire. Training for the certificate focuses on a better understanding of aircraft systems and a higher standard of airmanship. The commercial certificate itself does not allow a pilot to fly in instrument meteorological conditions. For aircraft categories where an instrument rating is available, commercial pilots without an instrument rating are restricted to daytime flight within when carrying passengers for hire.