JulianUK
Topic Author
Posts: 105
Joined: Sat Apr 29, 2006 6:00 am

What Does Side Step Exactly Mean?

Mon May 08, 2006 1:56 am

I was flying an approach to an airport on MS Flight Sim and I kept requesting 8R and air traffic said "fly an 8L approach and side step 8R" - ok but does this happen in real life and when do you actually side step - how far into the approach would this happen? before the 8L ILS or once established?
 
Alias1024
Posts: 2223
Joined: Mon Oct 25, 2004 11:13 am

RE: What Does Side Step Exactly Mean?

Mon May 08, 2006 3:16 am

Yes, this happens in real life. Normally, you would sidestep once you have visually acquired the runway you are sidestepping to. Sidestep procedures are usually used for a couple of reasons. The first would be if one runway had an instrument approach and the other didn't, and the weather required the use of the approach. The other is when spacing breaks down between the aircraft on approach. If the controller has an aircraft on final, but the runway won't be clear, they can ask the aircraft to sidestep to the other runway assuming it won't cause a conflict with other traffic.
It is a mistake to think you can solve any major problems with just potatoes.
 
113312
Posts: 580
Joined: Sat Apr 16, 2005 9:09 am

RE: What Does Side Step Exactly Mean?

Mon May 08, 2006 9:10 am

A sidestep is always a visual maneuver to landing on an adjacent parallel runway. An airport where this is frequently done is LAX where ILS approaches are normally being conducted to RWY 25L and most of the departures occur on RWY 25R. However, corporate and cargo aircraft frequently taxi out from south of 25L and hold for departures at the approach end. Although many flights can be instructed to taxi accross 25L in preparation for departure on the right, if conditions are favorable (ie spacing, visibility, etc.) the Tower controller may offer a sidestep to the approaching aircraft to change their landing to RWY 25R.

Sometimes, a sidestep is requested or offered to facilitate an easier exit of the runway or taxi route to parking. In any case, at airports with closely spaced parallel runways at which sidesteps can be performed, a minimum altitude is usually published to complete this maneuver.
 
timz
Posts: 6084
Joined: Fri Sep 17, 1999 7:43 am

RE: What Does Side Step Exactly Mean?

Mon May 08, 2006 12:06 pm

Quoting 113312 (Reply 2):
a minimum altitude is usually published to complete this maneuver.

Published where?
 
Mir
Posts: 19092
Joined: Mon Jan 05, 2004 3:55 am

RE: What Does Side Step Exactly Mean?

Mon May 08, 2006 12:22 pm

Quoting Timz (Reply 3):
Published where?

On the approach plate, I'd assume. IIRC, sidesteps use circling minimums.

-Mir
7 billion, one nation, imagination...it's a beautiful day
 
flymeariver
Posts: 82
Joined: Tue Jan 10, 2006 8:15 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 5:58 am

Quoting Mir (Reply 4):
On the approach plate, I'd assume. IIRC, sidesteps use circling minimums.

There have to be published side-step minimums or you can't execute a side-step, per se. Any other procedure where you shoot an approach to one runway and land on another would use circling minimums, whether or not they are parallel and/or next to eachother.
 
flyf15
Posts: 6633
Joined: Tue May 18, 1999 11:10 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 6:41 am

Although it looks like everyone has pretty much answered the question above, I'll share my story with sidesteps. Last fall at Denver Jeffco (BJC), the main runway, 11L/29R, (and only runway with an ILS) was shut down for roughly 2 months for construction.

We had lots of IFR days and they'd turn on the ILS for 29R, we'd shoot it, and then once visual, sidestep over to the smaller 29L. Occasionally we'd have to circle to 11R, but thats another story all together. Although not as great due to the higher minimums, it worked out well.
 
Mir
Posts: 19092
Joined: Mon Jan 05, 2004 3:55 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 7:05 am

Quoting FlyMeARiver (Reply 5):
There have to be published side-step minimums or you can't execute a side-step, per se. Any other procedure where you shoot an approach to one runway and land on another would use circling minimums, whether or not they are parallel and/or next to eachother.

You may say "circle" instead of "side-step", but they are for all intents and purposes the same thing. I've never actually seen published side-step minimums.

-Mir
7 billion, one nation, imagination...it's a beautiful day
 
flymeariver
Posts: 82
Joined: Tue Jan 10, 2006 8:15 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 7:56 am

Quoting Mir (Reply 7):
I've never actually seen published side-step minimums.

They're published on pretty much every approach where the sidestep is ever likely to be used. The ILS 4R at EWR and the ILS 33R at IAH are just 2 examples off the top of my head.
 
oly720man
Posts: 5740
Joined: Fri May 21, 2004 7:13 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 5:30 pm

Not sure this was a side step or a runway not clear, but I was once at JFK and Concorde was on approach for 31L and suddenly turned to make an approach on 31R. I think it was too close to the airport and had to do a go around. Noisy!
wheat and dairy can screw up your brain
 
CosmicCruiser
Posts: 2049
Joined: Tue Feb 22, 2005 3:01 am

RE: What Does Side Step Exactly Mean?

Tue May 09, 2006 9:19 pm

Just a note from our ops man...The runways cannot be more than 1200' apart. You may/can be cleared for the ILS with the sidestep but mins will be the published side step mins OR circling mins will be used. You are expected to commence the sidestep maneuver as soon as possible after the runway environment is in sight. At MDA if the runway environment is not in sight you will fly the published missed app. proced. for the primary runway.
 
flyf15
Posts: 6633
Joined: Tue May 18, 1999 11:10 am

RE: What Does Side Step Exactly Mean?

Mon May 15, 2006 4:59 am

Quoting Mir (Reply 7):
You may say "circle" instead of "side-step", but they are for all intents and purposes the same thing. I've never actually seen published side-step minimums.

Side step minimums are definitely out there. They let you get down below circling minimums, but not as low as the ILS can take you to the original runway. Here is the approach chart for the approach I talked about in reply 6.

http://204.108.4.16/d-tpp/0604/05612I29R.PDF

As you can see, minimums in AGL for a category A aircraft are:

ILS: 200ft
LOC: 305ft
Sidestep: 295ft
Circling: 510ft

The sidestep can get you lower than the LOC approach to the original runway can. They're really great to have in some situations.
 
IAHFLYR
Posts: 3941
Joined: Sat Jun 25, 2005 12:56 am

RE: What Does Side Step Exactly Mean?

Wed May 17, 2006 2:27 am

[quote=Mir,reply=7]You may say "circle" instead of "side-step", but they are for all intents and purposes the same thing. I've never actually seen published side-step minimums.

If the approach has both side-step and circling mins on the chart the clearance should be different for each that is expected. IAH ILS Runway 15R side-step Runway 15L or RNAV Runway 15R cirlcle Runway 9 will be issued in the clearance. Technically if the weather at the airport is less than VFR then the approach clearance must state what particular operation to be flown, if the tower wants the aircraft to side-step in an less than VFR weather, they must reclear the approach if the original clearance was not including the side-step part and that must be done outside of the final approach fix.
Any views shared are strictly my own and do not a represent those of any former employer.

Who is online

Users browsing this forum: No registered users and 15 guests