To determine the proper interval between aircraft, which condition must be met?

The correct choice is comprehensive because it encompasses multiple conditions essential for determining the proper interval between aircraft during operations. Each of the conditions listed is critical in ensuring safety and efficiency in aviation, especially during takeoffs, landings, and other maneuvers.

The first condition emphasizes the spatial awareness required while flying. Evaluating the position of the aircraft ahead, particularly when it is either abeam or behind your wingtip and has completed at least 90 degrees of turn, allows a pilot to understand the relative trajectory and position of that aircraft, thus enabling safe spacing.

The second condition refers to adherence to local standard operating procedures (SOP) or course rules. These guidelines are established to enhance safety by ensuring that all aircraft follow agreed-upon protocols during various phases of flight, allowing pilots to maintain a safe distance and avoid potential conflicts.

The third condition indicates that the proper interval for breaking behind another aircraft is specifically defined as being 45 degrees behind your wingtip. This quantifiable measure helps pilots establish a safe and manageable distance to ensure they can react to any potential changes during flight without compromising safety.

By acknowledging all these conditions, pilots can assess the spacing between their aircraft and others in the vicinity effectively. This comprehensive understanding of spacing and interval ensures safer operations