Airport Data Grouping (Pvt): Non-public use having emergency or landmark value. “OBJECTIONABLE”: This airport may adversely   affect airspace use. FAA Chart Users’ Guide - VFR Symbology - Sectional and Terminal Area Charts 24 UNICOM UNICOM Flight Service Station on field Airports where fixed wing special VFR opera - tions are prohibited (shown above airport  name) FAR 91 Indicates FAR 93 Special Air Traffic Rules and  Airport Traffic Pattern Location Identifier ICAO Location Identifier Control Tower (CT) - primary frequency Star indicates operation part-time. See tower  frequencies tabulation for hours of operation Follows the Common Traffic Advisory Fre - quency (CTAF) Automatic Terminal Information Services  Automatic Flight Information Service Automated Surface Weather Observing  Systems; shown when full-time ATIS is not  available. Elevation in feet Lighting in operation Sunset to Sunrise Lighting limitations exist; refer to Chart  Supplement Length of longest runway in hundreds of  feet; usable length may be less. Aeronautical advisory station Runways with Right Traffic Patterns (public  use) See Chart Supplement VFR Advisory Service Shown when ATIS is  not available and frequency is other than the  primary CT frequency. Weather Camera (Alaska) Airport of Entry  When information is lacking. the respective  character is replaced by a dash. Lighting  codes refer to runway edge lights and may  not represent the longest runway or full  length lighting. AIRPORTS (Continued)