FOREWORD
This document was prepared by Special Committee 167 of RTCA, Inc. It was approved by RTCA, Inc.
on December 1, 1992.
RTCA is an association of aeronautical organizations of the United States of America from both government
and industry. Dedicated to the advancement of aeronautics, RTCA seeks sound technical solutions to
problems involving the application of electronics and telecommunications to aeronautical operations. Its
objective is the resolution of such problems by mutual agreement of its member and participating
organizations.
The findings of RTCA are in the nature of recommendations to all organizations concerned. As RTCA is
not an official agency of the United States Government, its recommendations may not be regarded as
statements of official government policy unless so enunciated by the federal government organizations or
agency having statutory jurisdiction over any matters to which the recommendations relate.
The development of these guidelines was jointly accomplished by RTCA SC-167 and the European
Organization for Civil Aviation Equipment (EUROCAE) WG-12 through a consensus process.