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Height Above Touchdown (HAT) (HAT)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: hat.ttl
- Name
heightAboveTouchdown- Datatype
- Real
- Definition
- The vertical distance between the touchdown zone elevation and the Decision Altitude (DA) for precision approaches, or the Minimum Descent Altitude (MDA) for non-precision approaches.
- Description
- The Height Above Touchdown (HAT) applies to straight-in minima.
- Synonyms
- HAT
- Accepted
- 2013-10-18
- Defined by
- DFDD
- Physical quantity
- length
- Recommended unit
- Metre (m)
- Used by
- GA215 Terminal Instrument Procedure Minima
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.