The ICAO base turn procedure is mandatory for all approaches. True or False?

The ICAO base turn procedure is not mandatory for all approaches, making the statement false. While the procedure may be a requirement in certain circumstances or for specific types of approaches, it does not apply universally to all approaches across the board. Various approaches may have alternative prescribed methods or different requirements depending on the specific aircraft, the type of approach being used, and the associated airspace regulations. This flexibility allows for a variety of operations and can accommodate different aircraft categories and operational needs. Therefore, while the ICAO base turn may be beneficial in some scenarios, it is not a blanket requirement applicable to every approach.