An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Notice of availability; final policy and disposition of comments.
The Federal Aviation Administration (FAA) announces Policy Statement PS-AIR-600-39-01 for demonstrating an aircraft is a "radio altimeter tolerant airplane" or a "radio altimeter tolerant rotorcraft" using a method approved by the FAA.