Reference datum height explained

In aviation, reference datum height (RDH) is the height of a point, located above the intersection of the runway centre line and the threshold, through which the downward extended straight portion of the glide path passes.^[1] It is usually found on the aerodrome instrument approach charts.

See also

• Vertical datum
• ICAO recommendations on use of the International System of Units

Notes and References

1. http://www.eurocontrol.int/lexicon/lexicon/en/index.php/Instrument_Landing_System_Reference_Datum_Height Instrument Landing System Reference Datum Height