SPO.OP.111 Aerodrome operating minima — NPA, APV, CAT I operations

SI No. 1290/2024

Text in magenta in force from 30 October 2025

1. The decision height (DH) to be used for a non-precision approach (NPA) flown with the continuous descent final approach (CDFA) technique, approach procedure with vertical guidance (APV) or category I (CAT I) operation shall not be lower than the highest of:

   1. the minimum height to which the approach aid can be used without the required visual reference;

   2. the obstacle clearance height (OCH) for the category of aircraft;

   3. the published approach procedure DH where applicable;

   4. the system minimum specified in Table 1; or

   5. the minimum DH specified in the AFM or equivalent document, if stated.

2. The minimum descent height (MDH) for an NPA operation flown without the CDFA technique shall not be lower than the highest of:

   1. the OCH for the category of aircraft;

   2. the system minimum specified in Table 1; or

   3. the minimum MDH specified in the AFM, if stated.

Table 1 System minima

Facility	Lowest DH/MDH (ft)
Instrument landing system (ILS)	200
Global navigation satellite system (GNSS)/satellite-based augmentation system (SBAS) (lateral precision with vertical guidance approach (LPV))	200
GNSS (lateral navigation (LNAV))	250
GNSS/Baro-vertical navigation (VNAV) (LNAV/VNAV)	250
Localiser (LOC) with or without distance measuring equipment (DME)	250
Surveillance radar approach (SRA) (terminating at ½ NM)	250
SRA (terminating at 1 NM)	300
SRA (terminating at 2 NM or more)	350
VHF omnidirectional radio range (VOR)	300
VOR/DME	250
Non-directional beacon (NDB)	350
NDB/DME	300
VHF direction finder (VDF)	350

SPO.OP.111 will be repealed on 30 October 2025.