GM2 NCO.OP.111 Aerodrome operating minima — 2D and 3D approach operations

CAA ORS9 Decision No. 47

Text in magenta in force from 30 October 2025

DH/MDH — CALCULATION OF DA/MDA

NCO.OP.111 refers to DH and MDH because the rule compares heights with other heights (system minima, minimum DH in the AFM, etc.). Usually, the DH or MDH will be converted to DA or MDA for operational use by adding the threshold elevation.