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| Subject | English | Thesaurus |
| abbr., scottish | Approach / Landing Thrust Reverser programme | ALTR (USA) |
| transp., abbr. | Approach Lighting System Improvement Program | ALSIP |
| abbr. | Care Programme Approach | CPA |
| avia., amer. | DF approach procedure | A procedure used under emergency conditions where another instrument approach procedure (IAP) cannot be executed. DF guidance for an instrument approach is given by ATC facilities with DF capability. |
| abbr., avia. | High Intensity Approach Lighting System | HIALS (Interex) |
| aeron., abbr. | Maximum Intensity Approach Light System | MALS |
| abbr., scottish | Medium Intensity Approach Light System | MALS |
| transp., abbr. | Medium Intensity Approach Light System With Rail | MALSR |
| transp., abbr. | Medium Intensity Approach Light System With Sequenced Flashing Lights | MALSF |