Section 7. Operational Policy/Procedures for the Gulf of Mexico 50 NM Lateral Separation Initiative 4-7-1. Introduction and General Policies . 4-7-2. Accommodating Non-RNP 10 Aircraft . 4-7-3. Obtaining RNP 10 or RNP 4 Operational Authorization . 4-7-4. Authority for Operations with a Single Long-Range Navigation System . 4-7-5. Flight Plan Requirements . 4-7-6. 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 5-1-1. Preflight Preparation 5-1-2. Follow IFR Procedures Even When Operating VFR 5-1-3. Notice to Air Missions (NOTAM) System . 5-1-4. Operational Information System (OIS) . 5-1-5. Flight Plan - VFR Flights 5-1-6. Flight Plan - IFR Flights . 5-1-7. Flight Plans For Military/DoD Use Only 5-1-8. Flight Plan " Defense VFR (DVFR) Flights . 5-1-9. Single Flights Conducted With Both VFR and IFR Flight Plans 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 5-1-3 5-1-9 5-1-10 5-1-11 5-1-15 5-1-15 5-1-16 5-1-16 5-1-17 5-1-18 5-1-18 5-1-18 5-1-18 5-1-19 5-1-20 Section 2. Departure Procedures 5-2-1. Pre"taxi Clearance Procedures . 5-2-1 5-2-2. Automated Pre-Departure Clearance Procedures 5-2-1 5-2-3. IFR Clearances Off Uncontrolled Airports 5-2-2 5-2-4. Taxi Clearance 5-2-2 5-2-5. Line Up and Wait (LUAW) . 5-2-2 5-2-6. Abbreviated IFR Departure Clearance (Cleared.as Filed) Procedures . 5-2-3 5-2-7. Departure Restrictions, Clearance Void Times, Hold for Release, and Release Times . 5-2-5 5-2-8. Departure Control 5-2-6 5-2-9. Instrument Departure Procedures (DP) - Obstacle Departure Procedures (ODP), Standard Instrument Departures (SID), and Diverse Vector Areas (DVA) . 5-2-7 Section 3. En Route Procedures 5-3-1. ARTCC Communications 5-3-2. Position Reporting 5-3-3. Additional Reports 5-3-4. Airways and Route Systems . 5-3-5. Airway or Route Course Changes 5-3-1 5-3-13 5-3-15 5-3-16 5-3-18 Table of Contents