How many holding pattern templates are available for use?

The number of holding pattern templates available for use is 31. This number reflects the standardized patterns that can be utilized in air traffic control to manage aircraft safely and efficiently during holding procedures.

Holding patterns are designed to allow aircraft to remain in a specific area while awaiting further instructions, such as clearance to land or to proceed on their flight path. The use of standardized templates helps controllers maintain a consistent and organized approach to managing air traffic, particularly in busy airspace.

Each of the 31 templates provides distinct characteristics, like the direction of turns, the length of legs, and entry procedures, which help in accommodating various flight scenarios and pilot capabilities. Understanding the number and types of holding patterns is crucial for controllers to ensure safe and efficient operations under varying conditions.