What height does not interfere with aircraft authorities?

The height that does not interfere with aircraft authorities is typically set at 200 feet. This is because structures below this height are generally less likely to obstruct low-flying aircraft or interfere with airport operations. Regulatory bodies, such as the Federal Aviation Administration (FAA) in the United States, have guidelines that provide limits for structures in proximity to airports, often designating 200 feet as a safe height for many applications.

At heights beyond 200 feet, structures can start to require notifications and potentially have restrictions to ensure they do not pose a risk to air traffic. Therefore, maintaining structures at or below 200 feet is considered a standard practice to avoid complications with air navigation and to comply with aviation regulations.