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The joint precision approach and landing system (JPALS) is a ship's system (CVN and LH type), all-weather landing system based on real-time differential correction of the Global Positioning System (GPS) signal, augmented with a local area correction message, and transmitted to the user via secure means. The onboard receiver compares the current GPS-derived position with the local correction signal, deriving a highly accurate three-dimensional position capable of being used for all-weather approa

🫡🫡🫡Categories of ILS Approaches Instrument Landing Systems (ILS) are divided into CAT I, CAT II, and CAT III, based on how low and how blind you can land. 🫡CAT I (Category I) Decision Height (DH): ≥ 200 feet AGL Runway Visual Range (RVR): ≥ 550 m (1800 ft) System Requirements: Standard ILS equipment One autopilot or flight director No autoland required Used in most commercial and GA airports 🫡 CAT II (Category II) DH: ≥ 100 feet RVR: ≥ 300 m (1200 ft) System Requirements: Dual ILS receivers