Who shall give way between two aircraft converging at the same altitude on a 90-degree collision course?

• A. the aircraft which has the other on the right
• B. the aircraft which has the other on the left
• C. the aircraft that is faster
• D. the aircraft that is slower

Answer: (A)

When two aircraft are converging at the same altitude, the right-of-way rule applies: the aircraft on the left must give way to the aircraft on the right. In a crossing path, the one that has the other aircraft on its right is the one that must yield. So, if you are the aircraft that has the other on your right, you are responsible for giving way to avoid a collision. Speed or being faster/slower does not determine priority here; both should coordinate to maintain separation, but the right-of-way goes to the aircraft on the right.