NOTAM Decoder

• Q-code: Q)FIR/Q + subject(2) + condition(2) + traffic/purpose/scope
• A) aerodrome B) from C) to E) plain-language item
• Subject + condition decode from the ICAO Q-code tables

Decode: A1234/24 Q) VIDP/QMRLC/... A) VIDP B) 2401011200 C) 2401011800 E) RWY 11/29 CLSD.

1. 1.Q-code QMRLC → subject 'Runway', condition 'Closed'.
2. 2.A) VIDP is the aerodrome; B)/C) give the validity window.
3. 3.E) expands 'RWY 11/29 CLSD' → 'runway 11/29 closed'.

Runway 11/29 at Delhi (VIDP) closed 2024-01-01 12:00Z–18:00Z.

A NOTAM warns of any temporary change to facilities, services, procedures or hazards. The coded Q-line gives the subject and condition (e.g. runway closed), the A/B/C fields give the aerodrome and validity window, and the E field carries the plain-language detail. This decoder expands the common codes and abbreviations; anything it doesn't recognise is shown verbatim rather than dropped.

Learn the Q-code shape: the two letters after Q are the SUBJECT (MR = runway, MX = taxiway, OB = obstacle) and the next two are the CONDITION (LC = closed, AS = unserviceable). Times are UTC in YYMMDDHHMM. PERM means permanent; EST means the end time is estimated.