flyboy80
Posts: 1827
Joined: Fri Jul 13, 2001 8:10 am

What Are Those Black Signs On The Runway?

Tue Jul 08, 2003 2:46 pm

What are the black signs on runways at Commercial airports that say number like 1 then 2 then 3 then 4...etc? Thanks for any help. I think this could go in tech ops, but its kinda a split so I put it in the Civil aviation ones. I figured someone would ask...
bri
 
dragon-wings
Posts: 3907
Joined: Fri Apr 06, 2001 4:55 am

RE: What Are Those Black Signs On The Runway?

Tue Jul 08, 2003 2:58 pm

I think it's to let the pilots know how much runway is left when landing and taking off. Like 4 would be 4,000 feet.
Don't give up don't ever give up - Jim Valvano
 
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RE: What Are Those Black Signs On The Runway?

Tue Jul 08, 2003 2:59 pm

You probably mention the runway's "distance remaining" markers...
They actually count down 1,000 feet multiples of remaining runway.
6 would mean 6,000 remaining, 5 would be 5,000 feet, etc...
Not all airports do have such markings...
(s) Skipper
 
Yikes!
Posts: 284
Joined: Sat Oct 13, 2001 4:51 pm

RE: What Are Those Black Signs On The Runway?

Tue Jul 08, 2003 5:14 pm

Mostly military aerodromes. Unfortunately. I think they are great references. But in this day and age of runway analyses and balanced fields i.e. go/no go takeoff speeds, the bean counters and the regulatory agencies deem these signs as completely unnecessary. In the old days, they could be used to monitor takeoff acceleration. Nowadays we have much better engine instrumentation and higher thrust engines.

So in the end, the signs would be nice to have but not all that useful given the reality of today's equipment and takeoff analysis data. Additionally, in most places in North America where winter snow is a factor, it would be an extra cost to keep the signs clear of snow not to mention lit all year round.
 
Ralgha
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RE: What Are Those Black Signs On The Runway?

Wed Jul 09, 2003 12:59 am

You're assuming that only modern, sophisticated aircraft use runways anymore. Those signs are still useful for pilots of older, or less well-endowed aircraft. I wouldn't go so far as to say mostly military airports either. I've seen them at a large number of civil airports.
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Yikes!
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Joined: Sat Oct 13, 2001 4:51 pm

RE: What Are Those Black Signs On The Runway?

Wed Jul 09, 2003 1:15 am

Should have said "Canadian" military airports still have 'em. Anyway, if the painted marks on the runway are accurate, one has a somewhat "digital" method of determining runway used/remaining.  Big grin

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