Instrument Rating refers to the qualifications that a pilot must have in order to fly under IFR (Instrument Flight Rules).
It requires additional training and instruction beyond what is required for a Commercial Pilot’s Licence, including rules and procedures specific to instrument flying, additional instruction in Meteorology, and more intensive training in flight solely by reference to the aircraft’s instruments.
Testing consists of a practical Flight Test. The Flight Test is divided into an oral component to verify that the applicant understands the theory of instrument flying and an actual flight to ensure the pilot possesses the practical skills required for safe IFR flight.