How far should hazards be posted on either side of the course line for safety?

The correct choice involves understanding the safety protocols surrounding operational procedures during terrain flight operations. Posting hazards at a distance of 10 nautical miles (NM) on either side of the course line is considered a standard measure to enhance safety and ensure that pilots have sufficient warning to prepare for potential challenges.

This 10 NM buffer provides a balance between being adequately informed about hazards without overwhelming the pilot with excessive information. At this distance, pilots can assess their options and navigate safely, taking proper measures to avoid any risks associated with potentially dangerous terrain, weather conditions, or other obstacles. The 10 NM standard helps to create a protective margin that promotes situational awareness, which is crucial for effective decision-making in flight operations.

A greater distance, while potentially providing more time to react, might not be practical due to limitations in the pilot's ability to process information and the operational capabilities of the aircraft. The chosen distance allows for a reasonable assessment while maintaining operational efficiency.