Which component is typically used to navigate during IFR flights?

The correct component for navigation during Instrument Flight Rules (IFR) flights is a VOR, or Very High Frequency Omnidirectional Range. VORs are pivotal in modern aviation navigation and work by transmitting radio signals that pilots can use to determine their position relative to the VOR station. The signals allow pilots to navigate effectively along specific airways, which are defined routes in the sky for IFR flight.

VORs are instrumental for maintaining course and direction, especially in low visibility conditions where reliance on visual cues is not possible. Pilots can use VOR receivers to tune into these stations and track their positions, thus ensuring safe and accurate navigation through controlled airspace.

In contrast, a radio altimeter measures the aircraft's altitude above the terrain but does not assist in navigation; a transponder aids in identification and tracking by air traffic control but does not provide navigational information; and a weather radar detects weather patterns but does not contribute to the navigation capabilities needed during IFR operations. Thus, the VOR stands out as a fundamental tool for navigation in IFR flying.