Which aircraft must yield to gliders when converging at the same altitude?

The correct answer is that power-driven heavier-than-air aircraft must yield to gliders when converging at the same altitude. This rule is grounded in the principle of right-of-way in aviation, where gliders, being non-powered aircraft, have the right of way over powered aircraft. The rationale behind this is that gliders are generally less maneuverable compared to powered aircraft, as they rely on wind currents for lift and are often in a delicate state of managing their descent and altitude.

Regional and international aviation regulations adhere to this principle to ensure safety in the skies. By yielding to gliders, pilots of power-driven aircraft help facilitate smoother operations and reduce the risk of collisions. This is particularly important because gliders may already be committed to a flight path and require a stable airspace to maintain their lift without the benefit of a power unit for immediate adjustments.

This situation emphasizes the responsibility of powered aircraft operators to be vigilant and respectful of the airspace usage by non-powered aircraft to uphold safety standards in aviation.