Instrument approaches

[afterburner2]

I know that on an instrument approach, you can continue after MDA/H DA/H if you see threshold lights etc. I however can't seem to find the specific number of lights to be seen? For instance is it just one runway centre light etc.
Can anyone help?

[Curtis E Carr]

From the AIP

The approach must not be continued below MDA/MDH unless at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot:

a elements of the approach light system;

b the threshold;

c the threshold markings;

d the threshold lights;

e the threshold identification lights;

f the visual glide slope indicator;

g the touchdown zone or touchdown zone markings;

h the touchdown zone lights;

i FATO/runway edge lights; or

j other visual references accepted by the CAA.

and

A pilot may not continue an approach below the Category I decision height, determined in accordance with sub-paragraph 3.6.2, unless at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot:

a elements of the approach light system;

b the threshold;

c the threshold markings;

d the threshold lights;

e the threshold identification lights;

f the visual glide slope indicator;

g the touchdown zone or touchdown zone markings;

h the touchdown zone lights; or

i FATO/runway edge lights

From PANSOPS

The required visual reference means that section of the visual aids or of the approach area which should have been in view for sufficient time for the pilot to have made an assessment of the aircraft position and rate of change of position, in relation to the desired flight path

From JAR-OPS 1

Visual Reference. A pilot may not continue an approach below MDA/MDH unless at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot:

(i) Elements of the approach light system;

(ii) The threshold;

(iii) The threshold markings;

(iv) The threshold lights;

(v) The threshold identification lights;

(vi) The visual glide slope indicator;

(vii) The touchdown zone or touchdown zone markings;

(viii) The touchdown zone lights;

(ix) Runway edge lights; or

(x) Other visual references accepted by the Authority.

and

Visual Reference. A pilot may not continue an approach below the Category I decision height, determined in accordance with sub-paragraph (c)(2) above, unless at least one of the following visual references for the intended runway is distinctly visible and identifiable to the pilot:

(i) Elements of the approach light system;

(ii) The threshold;

(iii) The threshold markings;

(iv) The threshold lights;

(v) The threshold identification lights;

(vi) The visual glide slope indicator;

(vii) The touchdown zone or touchdown zone markings;

(viii) The touchdown zone lights; or

(ix) Runway edge lights

[afterburner2]

Thanks Curtis

[Curtis E Carr]

Nae probs!