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  • Appendix B: Acronyms, Abbreviations, and NOTAM Contractions

    voice recording system VSCS—voice switching and control system VTA—vertex time of arrival VTAC—VOR and TACAN (collocated) VTOL—vertical takeoff and landing VTS—voice telecommunications system W—west WAAS—Wide Area Augmentation System WAN—wide area network ... Friday WKEND—Saturday and Sunday WMSC—Weather Message Switching Center WMSCR—Weather Message Switching Center Replacement WND—wind WPT—waypoint WSCMO—Weather Service Contract Meteorological Observatory WSFO—Weather Service Forecast Office WSMO—Weather Service Meteorological Observatory WSO—Weather Service Office…

  • Chapter 5. Air Traffic Procedures › Section 2. Departure Procedures › 5-2-7. Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times

    Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times a. ATC may assign departure restrictions, clearance void times, hold for release, and release times, when necessary, to separate departures from other traffic or to restrict or regulate ... from an airport without an operating control tower must be issued either a departure release (along with a release time and/or void time if applicable), or a hold for release. 1. Clearance Void Times. A pilot may receive a clearance…

  • Chapter 1. Air Navigation › Section 2. Performance-Based Navigation (PBN) and Area Navigation (RNAV) › 1-2-1. General

    addition, pilots should have an understanding of the various waypoint and leg types used in RNAV procedures; these are discussed in more detail below. (a) Waypoints. A waypoint is a predetermined geographical position that is defined in terms of latitude/longitude ... coordinates. Waypoints may be a simple named point in space or associated with existing navaids, intersections, or fixes. A waypoint is most often used to indicate a change in direction, speed, or altitude along the desired path. RNAV procedures make…

  • Chapter 5. Air Traffic Procedures › Section 4. Arrival Procedures › 5-4-10. Timed Approaches from a Holding Fix

    must not execute a procedure turn. (14 CFR section 91.175.) b. Although the controller will not specifically state that “timed approaches are in use,” the assigning of a time to depart the final approach fix inbound (nonprecision approach ... outer marker or fix used in lieu of the outer marker inbound (precision approach) is indicative that timed approach procedures are being utilized, or in lieu of holding, the controller may use radar vectors to the Final Approach Course…

  • Chapter 2: En Route Operations › Fuel State Awareness

    flight scheduled for one hour or less, the flight crew may record the time and fuel remaining at the top of climb (TOC) and at one additional waypoint listed in the flight plan. Generally, TOC is used in aircraft with ... additional waypoint recording requirement if the flight is so short that the record will not assist in the management of the flight. For flights scheduled for more than one hour, the pilot may record the time and fuel remaining shortly…