METHOD FOR DETERMINATION OF AERODROME OPERATING MINIMA

Question 1

Take-off minima are expressed in:

Answer 1

• ceiling/vertical visibility, and
• visibility (VIS)/ runway visual range
  (RVR).

Question 2

Landing minima are expressed as follows:

Answer 2

(a) Precision approach
- In decision altitude (DA) and decision height (DH) and visibility/runway visual range (RVR).
(b) Non-precision approach
- In minimum descent altitude/height
(MDA/MDH) and visibility/runway visual
range (RVR).
In principle minima for straight-in NDB/ VOR approaches will be published where the approach track does not diverge more than 20 degrees from the centerline of the runway. In exceptional cases an angle of more than 20 degrees will be indicated in
the IAL.

Question 3

Circling approach

Answer 3

In minimum descent altitude (MDA) and visibility.
At MDA an obstacle clearance of at least 400 ft is provided within a radius of:
- 2,66 NM for category B aeroplane,
- 4,20 NM for category C aeroplane
around the usable landing threshold.
The arcs are joined by tangents.

CAUTION! while using circle-to-land procedure, the obstacle clearance mentioned above is ensured only if the chart is developed i.a.w PANS OPS 4, which is mentioned in the left-down corner of the IAL chart.

The stipulated minima in no way affect the commander’s final authority to decide on higher minima if deemed necessary.