FAR 91.155 — Basic VFR Weather Minimums

This regulation specifies the minimum flight visibility and distance from clouds required for VFR operations in each class of airspace. Requirements range from 1 statute mile visibility and clear of clouds in Class G below 1,200 feet AGL during the day, up to 5 statute miles visibility with 1,000 feet above, 1,000 feet below, and 1 statute mile horizontal from clouds above 10,000 feet MSL. Student pilots must memorize these minimums because they vary by airspace class, altitude, and day versus night, and the written test frequently tests them.