Procedures and Aircraft Behavior /*TRE/ The purpose of this
article is to familiarize controllers with terminal area
navigation (RNAV) procedure structure and expected aircraft
behavior. First described are terminal RNAV benefits and the
"building blocks" of an RNAV standard terminal arrival route
(STAR) and standard instrument departure (SID). The next section
explains the expected behavior of aircraft flying advanced RNAV
routes. The final section discusses the accuracy of RNAV and the
use of radar vectors with RNAV procedures. Although the focus of
this article is on terminal procedures, the flight behavior
described is applicable to both the terminal and en route
environments. RNAV allows an aircraft to operate on any desired
path without the need to fly directly toward or away from a
ground-based navigation aid (NAVAID). Aircraft position is
determined using NAVAIDs, a self-contained system (such as an
inertial reference system), the global positioning satellite
system (GPS) or a combination of these. Pi