<P> The FAA designates other areas of airspace that do not fit the definitions of the classes of airspace above or special use airspace . With the exception of Temporary Flight Restrictions, these airspace areas do not confer any regulatory requirements on pilots; they are instead designated to draw special attention to an unusual activity or hazard, or to provide additional services to participating pilots . </P> <P> Local Airport Advisory (LAA) service is provided within 10 statute miles of an airport where a Flight Service Station is located and a control tower is not operating . The FSS provides advisories regarding weather and known traffic to all participating aircraft within the area, in effect acting as an "advisory" tower which helps to coordinate traffic, but does not directly control it . At these airports Flight Service also serves the function of relaying ATC clearances to IFR aircraft . Participation by VFR aircraft is not required . </P> <P> A similar service, Remote Airport Advisory (RAA), is provided at non-towered airports that do not have a FSS but nonetheless have a level of activity that is high enough to justify the service . At these airports communication is "remoted" to a nearby FSS . </P> <P> Terminal radar service area, or TRSA, is general controlled airspace wherein ATC provides radar vectoring, sequencing, and separation on a full - time basis for all IFR and participating VFR aircraft . Service provided at a TRSA is called "stage III service". TRSA's are depicted on VFR aeronautical charts . Pilot participation is urged but is not mandatory . </P>

Where are class b airspace operating rules found