IFR Navigation, or Instrument Flight Rules Navigation, is a method used by pilots to navigate aircraft in conditions where visibility is limited, such as in clouds or fog. It relies on instruments and navigation aids rather than visual references outside the cockpit. Pilots use tools like GPS, VOR, and ILS to determine their position and maintain a safe flight path. To operate under IFR, pilots must be trained and certified, ensuring they can interpret instrument readings accurately. This system enhances safety by allowing flights to continue in poor weather conditions, enabling air traffic to flow smoothly and efficiently.