PPRuNe Forums - Circling minima on approach chart

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Thanks Boroda - can you fill in the last 4 items?

GF

They are basic for you, respect to you. Because they basically based on your base. But not for me and that is why I am here. I don't ask Delta pilots why they have special training before flights to Moscow or Airbus instructors why they are so childish when flying to Ekaterinburg.

Hey guys,

If someone asks a simple question isn't it our job to supply the answer without the sarcasm that's evident here. At some stage or other all of us have either not been taught something or more likely have forgotten it - no matter how basic the information may be to you. If Baroda knew the answer he wouldn't be asking would he? I agree that the runway environment must always be in view. Circling is really for the birds. It's a visual manoeuvre in (usually) the worst of circumstances - poor vis and strong winds. While the ND capabilities of modern a/c undoubtedly help, I'm convinced that it's not really a safe manoeuvre for a transport category aeroplane.

The question about the applicable MDA has been answered.

In the case of a higher MDA (ex: 1,000'), just remember that the circling approach is a visual maneuver. I normally start descent on BASE leg with the runway in sight to judge my vertical profile using the same timing of 20 secs corrected for tailwind. Descent rate in excess of 1,000 FPM might be required. Perfect example of this is in BUSAN (or Pusan, S.Korea). Check it out.

Just don't forget to brief your colleague accordingly. Cheers!

Bear in mind that the CIRCLING APPROACH is an extension of an instrument approach procedure which provides for visual circling of the aerodrome prior to landing.

7.4 MISSED APPROACH PROCEDURE WHILE CIRCLING

7.4.1

If visual reference is lost while circling to land from an instrument approach, the missed approach specified for that particular procedure

shall be followed. The transition from the visual (circling) manoeuvre to the missed approach should be initiated by a climbing turn, within the circling area, towards the landing runway, to return to the circling altitude or higher, immediately followed by interception and execution of the missed approach procedure. The indicated airspeed during these
manoeuvres shall not exceed the maximum indicated airspeed associated with visual manoeuvring.

7.4.2

The circling manoeuvre may be carried out in more than one direction. For this reason, different patterns are required to establish the aircraft

on the prescribed missed approach course depending on its position at the time visual reference is lost.

Hope this helps.

Quote:

Originally Posted by The Captain

The question about the applicable MDA has been answered.

- where, exactly? Are you saying that post #2 is correct, because in my limited experience I have not seen an airfield where a published CM is tied to a particular runway, and I asked (in #15) Boroda, out of interest, for the actual figures and anyone for examples in #10? I would be interested in examples if you know of any.

Quote:

may i ask which missed approach procedure would you follow in case of a go around?

You fly the MA from the ORIGINAL approach unless you're Rainboe and at Heathrow, in which case you do what you want cos you've been operating out of there for years :}

Ok, apologies if i was a bit obscure.

"...I have not seen an airfield where a published CM is tied to a particular runway..."

Strictly speaking, this is CORRECT. If a flight is allowed to circle in a sector, the minima applies for that sector, not runway/s. Of course, if there is only one runway, this becomes academic.

A sector in the circling area where a prominent obstacle exists may be ignored for OCA/H calculations if it is outside the final approach and missed approach areas. When this option is exercised, the published procedure prohibits circling within the entire sector in which the obstacle is located.

There are circling minima published for a specified runway. Offhand, I can cite Da Nang (VN) as example. If you come in from the south (for Rwy 35L or 35 R), the charts specify Circle-To-Land 17L (only). The mountains in the west must've a lot to do with circling approach not authorized for 17R.

Quote:

Of course, if there is only one runway, this becomes academic.

- agreed, but not as far as I can see from Boroda's p.o.v from the original question where "Is circling MDA on the chart for RW36 in right lower corner or should we refer for MDA to RW18 chart?" suggests either a different answer or confusion?