What is the primary advantage of rotary-wing aircraft over fixed-wing aircraft?

The primary advantage of rotary-wing aircraft over fixed-wing aircraft is their ability to perform hovering flight and execute vertical takeoff and landing (VTOL). This capability allows rotary-wing aircraft, such as helicopters, to operate in confined spaces and reach locations that may be inaccessible to fixed-wing aircraft.

Wingless design enables rotary-wing aircraft to maintain a stationary position in the air, which is particularly useful in various applications, including search and rescue missions, medical evacuations, aerial photography, and more. Additionally, the ability to take off and land vertically eliminates the need for runways, providing greater operational flexibility in urban environments or on uneven terrains.

In contrast, fixed-wing aircraft require runways for takeoff and landing, which may limit their operational reach compared to the versatility offered by rotary-wing designs. The other answer choices do not encapsulate this unique and crucial capability that rotary-wing aircraft possess.