AX - Aeronautical fixed

AVW - Audio visual warning systems

AXO - Aeronautical operational fixed

DGP - Differential GPS

DLT - Aircraft data link land test

FA - Aeronautical land (unspecified)

FAC - Airport control tower

FAE - Aeronautical enroute

FAM - Aeronautical multicom

FAR - Aeronautical search and rescue

FAS - Aviation support

FAT - Flight test

FAU - Aeronautical advisory (unicom)

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

UAT - Universal Access Transceiver