The instrument rating is issued so pilots can fly into weather which is below VFR [Visual Flight Rules]. This allows a pilot to fly through clouds or land in reduced visibility. This rating is absolutely essential for airlines and corporate operators to operate in almost all weather.
Pilots without the rating are prevented from operating aircraft in certain weather conditions where visibility is greatly reduced, which limits their maximum allowable altitude, restricts the ability to operate the aircraft at night.
REQUIREMENTS FOR THE INSTRUMENT RATING
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