What is a requirement for operating an aircraft as per CAR 602.21?

The requirement for operating an aircraft as per CAR 602.21 focuses on avoiding proximity to another aircraft to prevent collision. This regulation emphasizes the importance of maintaining safe distances between aircraft during flight. By avoiding situations where aircraft may come too close, pilots help ensure safety for themselves, their passengers, and others in the airspace.

Safety in aviation is paramount, and this requirement is part of a broader framework designed to reduce the risk of mid-air collisions, which can lead to catastrophic outcomes. By adhering to this regulation, pilots contribute to the overall safety and integrity of air traffic.

The other options suggest conditions during flight that may not directly align with the specific safety requirement outlined in CAR 602.21. For instance, while maintaining visual contact with the ground can be crucial for certain types of operations and flying at night has specific requirements, they are not the primary focus of this regulation aimed at collision avoidance. Additionally, flying at a specified altitude does not specifically relate to avoiding aircraft proximity. Hence, the emphasis on maintaining safe distances ensures effective safety measures within the airspace system.