Appendix B - Acronyms and Abbreviations

BC—back course CERAP—center radar approach control; combined center BCA—benefit/cost analysis radar approach control BCN—beacon CESA—Class E surface area BCR—benefit/cost ratio CFC—central flow control BDAT—digitized beacon data CFCF—Central Flow Control Facility BERM—snowbank(s) containing earth/gravel CFCS—central flow control service BLW—below CFR—Code of Federal Regulations BMP—best management practices CFWP—central flow weather processor BND—bound CFWU—central flow weather unit BOC—Bell Operating Company CGAS—Class G Airspace; Coast Guard Air Station bps—bits per second CHG—change BRG—bearing CIG—ceiling BRI—basic rate interface CK—check BRITE—bright radar indicator terminal equipment CL—centerline BRL—building restriction line CLC—course line computer BUEC—back-up emergency communications CLIN—contract line item BUECE—back-up emergency communications equipment CLKWS—clockwise BYD—beyond CLR—clearance, clear(s), cleared to CLSD—closed C CLT—calculated landing time CM—commercial service airport C/S/S/N—capacity/safety/security/noise CMB—climb CAA—civil aviation authority; Clean Air Act CMSND—commissioned CAAS—Class A Airspace CNL—cancel CAB—civil aeronautics board CNMPS—Canadian Minimum Navigation Performance CARF—Central Altitude Reservation Facility Specification Airspace CASFO—Civil Aviation Security Office CNS—consolidated NOTAM system CAT—category; clear-air turbulence CNSP—consolidated NOTAM system processor CAU—Crypto Ancillary Unit CO—central office CBAS—Class B airspace COE—U.S. Army Corps of Engineers CBI—computer based instruction COM—communications CBSA—Class B surface area COMCO—command communications outlet CC&O—customer cost and obligation CONC—concrete CCAS—Class C Airspace CONUS—Continental United States CCC—Communications Command Center CORP—private corporation other than ARINC or MITRE CCCC—staff communications CPD—coupled CCCH—central computer complex host CPE—customer premise equipment CCLKWS—counterclockwise CPMIS—consolidated personnel management information CCS7-NI—Communication Channel Signal-7-Network system Interconnect CRA—conflict resolution advisory CCSA—Class C surface area CRDA—converging runway display aid CCSD—Command Communications Service Designator CRS—course CCU—Central Control Unit CRT—cathode ray tube CD—clearance delivery; common digitizer CSA—communications service authorization CDAS—Class D Airspace CSIS—centralized storm information system CDR—cost detail report CSO—customer service office CDSA—Class D surface area CSR—communications service request CDT—controlled departure time CSS—central site system CDTI—cockpit display of traffic information CTA—controlled time of arrival; control area CEAS—Class E Airspace CTA/FIR—control area/flight information region CENTX—central telephone exchange CTAF—common traffic advisory frequency CEP—capacity enhancement program CTAS—center-TRACON automation system CEQ—council on environmental quality B-3