This document contains MOPS for avionics that provide 
Aeronautical Mobile Satellite (R) System (AMS(R)S) services by 
means of satellite communications technologies scheduled to 
become operational after the year 2000. To comply with the 
minimum requirements of this document, an NGSS applicant is 
required to submit information regarding the technical 
characteristics of the NGSS. The technology specific technical 
requirements for each such system will become normative 
attachments to this document. It is anticipated that such 
technology specific attachments will be added to this document 
as the particular NGSS becomes operational for AMS(R)S.