Part 91.155 (Basic VFR Weather Minimums)

Part 91.155 outlines the minimum weather conditions required for pilots flying under Visual Flight Rules (VFR). It specifies visibility and cloud distance standards to ensure safe navigation without relying on instruments. For flights that don’t involve controlled airspace, pilots need at least 3 miles of visibility and must stay clear of clouds by a certain distance (500 feet below, 1,000 feet above, and 2,000 feet horizontally). These rules help ensure pilots can see and avoid obstacles, terrain, and other aircraft, maintaining safety during VFR operations.