Precision Approaches and Systems
- ILS – Instrument Landing System
- TLS - Transponder Landing System
- MLS – Microwave Landing System
- PAR – Precision Approach Radar (military)
- LAAS – Local Area Augmentation System (a ground-based augmentation system (GBAS) for global navigation satellite systems (GNSS))
- JPALS – Joint Precision Approach and Landing System
- GCA – Ground-Controlled Approach (mostly military)
- GLS – GNSS Landing System
Read more about this topic: Instrument Approach
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“Our little systems have their day;
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—Alfred Tennyson (1809–1892)