Section 7. Operational Policy/Procedures for the Gulf of Mexico 50 NM Lateral Separation Initiative Introduction and General Policies . Accommodating Non-RNP 10 Aircraft . Obtaining RNP 10 or RNP 4 Operational Authorization . Authority for Operations with a Single Long-Range Navigation System . Flight Plan Requirements . Contingency Procedures 4-7-1 4-7-1 4-7-1 4-7-2 4-7-2 4-7-2 Chapter 5. Air Traffic Procedures Section 1. Preflight Preflight Preparation Follow IFR Procedures Even When Operating VFR Notice to Airmen (NOTAM) System . Flight Plan - VFR Flights Operational Information System (OIS) . Flight Plan- Defense VFR (DVFR) Flights . Composite Flight Plan (VFR/IFR Flights) . Flight Plan (FAA Form 7233-1)- Domestic IFR Flights International Flight Plan (FAA Form 7233-4)- IFR Flights (For Domestic or International Flights) 5-1-10. IFR Operations to High Altitude Destinations 5-1-11. Flights Outside U.S. Territorial Airspace . 5-1-12. Change in Flight Plan . 5-1-13. Change in Proposed Departure Time 5-1-14. Closing VFR/DVFR Flight Plans . 5-1-15. Canceling IFR Flight Plan . 5-1-16. RNAV and RNP Operations . 5-1-17. Cold Temperature Operations 5-1-1 5-1-2 5-1-2 5-1-7 5-1-10 5-1-10 5-1-11 5-1-11 5-1-17 5-1-27 5-1-28 5-1-29 5-1-29 5-1-29 5-1-29 5-1-30 5-1-31 Section 2. Departure Procedures Pre"taxi Clearance Procedures . 5-2-1 Automated Pre-Departure Clearance Procedures 5-2-1 IFR Clearances Off Uncontrolled Airports 5-2-2 Taxi Clearance 5-2-2 Line Up and Wait (LUAW) . 5-2-2 Abbreviated IFR Departure Clearance (Cleared.as Filed) Procedures . 5-2-3 Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times . 5-2-4 5-2-8. Departure Control 5-2-5 5-2-9. Instrument Departure Procedures (DP) - Obstacle Departure Procedures (ODP), Standard Instrument Departures (SID), and Diverse Vector Areas (DVA) . 5-2-6 Section 3. En Route Procedures ARTCC Communications Position Reporting Additional Reports Airways and Route Systems . 5-3-1 5-3-13 5-3-14 5-3-15 Table of Contents