What are the recommended attributes for features to be used as checkpoints?

The recommended attributes for features to be used as checkpoints emphasize the importance of easy identification from the air. This is crucial for pilots navigating visually, as recognizable landmarks can significantly aid in confirming their position during the flight. Features that are easily identifiable ensure pilots can quickly verify their location, leading to safer and more effective navigation.

While attributes such as common knowledge, high elevation, and proximity to controlled airspace might offer some value, they do not inherently ensure that a feature is suitable as a checkpoint. Common knowledge might reference landmarks known to many, but this does not guarantee that they are easily seen or recognized from an aircraft. High elevation can make features more visible but does not necessarily mean they are easily identifiable. Proximity to controlled airspace can be a factor in choosing checkpoints for operational reasons, yet it does not reflect the clarity or ease of visual identification from the air, which remains the primary concern for navigation. Hence, the capability for clear visual identification is paramount in choosing effective checkpoints.