What type of identifiers are assigned to private air navigation facilities?

Private air navigation facilities are typically assigned number-letter identifiers. This system provides a way to categorize and identify various private facilities, which often do not have the same visibility or common usage as public facilities.

The number-letter format serves to create unique identifiers that are easily distinguishable and manageable within the broader air traffic system. While other identifier formats exist for different air navigation aids and facilities, the use of number-letter combinations specifically helps to ensure that private facilities are still integrated within the overall air traffic control system while providing clarity and reducing confusion.

This contrasts with other systems, such as letter-letter combinations or different formats, which are used primarily for public air navigation facilities or other specific aviation purposes, thereby highlighting the specificity of the number-letter assignments for private facilities.