What is the primary function of VOR equipment?

The primary function of VOR (VHF Omnidirectional Range) equipment is navigation. VOR is a type of radio navigation system used by pilots to determine their position and stay oriented during flight. It provides the aircraft with directional information that helps pilots navigate along specific flight paths and approach or depart from airports.

By receiving signals transmitted from ground-based VOR stations, pilots can obtain their bearing relative to these stations, which allows for efficient and accurate navigation across various altitudes and airspace. This capability is essential for ensuring safe and effective flight operations.

The other choices, while relevant in the context of aviation, do not pertain directly to the primary function of VOR equipment. Communication is accomplished through different radio systems, weather monitoring is handled by meteorological equipment, and aircraft maintenance involves a range of checks and servicing rather than navigation. Thus, the distinction of navigation as the core function of VOR makes it the correct answer.