Sec. 87.319  Scope of service.

    Aviation support stations are used for the following types of 
operations:
    (a) Pilot training;
    (b) Coordination of soaring activities between gliders, tow aircraft 
and land stations;
    (c) Coordination of activities between free balloons or lighter-
than-air aircraft and ground stations;
    (d) Coordination between aircraft and aviation service organizations 
located on an airport concerning the safe and efficient portal-to-portal 
transit of the aircraft, such as the types of fuel and ground services 
available; and
    (e) Promotion of safety of life and property.