Which aircraft must cede right of way when converging with a balloon at the same altitude?

When aircraft are converging at the same altitude, specific right-of-way rules apply according to aviation regulations. Among these, special consideration is given to balloons, which are considered the least maneuverable type of aircraft. As a result, any aircraft encountering a balloon at the same altitude must cede the right of way to it.

This rule encompasses all types of aircraft, including gliders, helicopters, and power-driven aircraft. Each of these aircraft categories, regardless of their capabilities or types, is required to yield to a balloon in such scenarios. This is designed to ensure the safety of all aircraft involved and reflects the balloon's unique operational characteristics, such as its limited ability to change altitude or direction quickly.

Therefore, the correct answer indicates that all aircraft, regardless of type, must cede the right of way to a balloon when converging at the same altitude.