[Code of Federal Regulations] [Title 47, Volume 5] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 47CFR87.171] [Page 203] TITLE 47--TELECOMMUNICATION CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) PART 87_AVIATION SERVICES--Table of Contents Subpart E_Frequencies Sec. 87.171 Class of station symbols. The two or three letter symbols for the classes of station in the aviation services are: Symbol and class of station AX--Aeronautical fixed AXO--Aeronautical operational fixed DGP--Differential GPS FA--Aeronautical land (unspecified) FAU--Aeronautical advisory (unicom) FAC--Airport control tower FAE--Aeronautical enroute FAM--Aeronautical multicom FAP--Civil Air Patrol FAR--Aeronautical search and rescue FAS--Aviation support FAT--Flight test FAW--Automatic weather observation GCO--Ground Communication Outlet MA--Aircraft (Air carrier and Private) MA1--Air carrier aircraft only MA2--Private aircraft only MOU--Aeronautical utility mobile MRT--ELT test RCO--Remote Communications Outlet RL--Radionavigation land (unspecified) RLA--Marker beacon RLB--Radiobeacon RLD--RADAR/TEST RLG--Glide path RLL--Localizer RLO--VHF omni-range RLS--Surveillance radar RLT--Radionavigation land test RLW--Microwave landing system RNV--Radio Navigation Land/DME RPC--Ramp Control TJ--Aircraft earth station in the Aeronautical Mobile-Satellite Service [53 FR 28940, Aug. 1, 1988, as amended at 57 FR 45750, Oct. 5, 1992; 64 FR 27475, May 20, 1999; 69 FR 32882, June 14, 2004]