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  #11  
Old 01-17-2015, 10:56 PM
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boom3 boom3 is offline
 
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Quote:
Originally Posted by Scott Hersha View Post
Does anybody even use these things anymore? I doubt it. I haven't flown an airplane with a marker beacon antenna in at least ten years. We have an NDB, but its not needed here either. The final approach segment is defined by Glide Scope Intercept as far as I know. If someone ran over that thing with a lawn mower, it may be weeks before anyone even noticed. It should be in a museum.
You would need the marker beacon if you didn't have an ADF receiver or DME while flying the Localizer only (no glideslope) approach.

How many people use these anymore is a good question though.
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Last edited by boom3 : 01-17-2015 at 11:06 PM.
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  #12  
Old 01-17-2015, 11:09 PM
scsmith scsmith is offline
 
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Default no brick in california!

the poster that said there should be a brick building near it has never lived in california. A brick structure will essentially explode in a good earthquake.
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  #13  
Old 01-18-2015, 01:27 AM
enielsen enielsen is offline
 
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Location: Los Angeles, CA
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Default lol

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Originally Posted by scsmith View Post
the poster that said there should be a brick building near it has never lived in california. A brick structure will essentially explode in a good earthquake.
haha... but in our defense, the doubters that is, it still looks hokey. That government sign looks like it was screwed up to that fence yesterday and yet the rest of the structures are decades old looking. If the sign needed replacing, at least send the guy out to cut the grass too. lol. Perhaps it is for real. Entertaining thread either way.
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  #14  
Old 01-18-2015, 07:09 AM
PaigeHoffart PaigeHoffart is offline
 
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Quote:
Originally Posted by Scott Hersha View Post
Does anybody even use these things anymore? I doubt it. I haven't flown an airplane with a marker beacon antenna in at least ten years. We have an NDB, but its not needed here either. The final approach segment is defined by Glide Scope Intercept as far as I know. If someone ran over that thing with a lawn mower, it may be weeks before anyone even noticed. It should be in a museum.
Even if you are just shooting the ILS from radar vectors, it's a good idea to cross check your position at glide slope intercept using the OM, or suitable substitute (NDB, DME, GPS) and monitor your VVI (VSI) for two reasons:

1) Antenna side lobes create false glide paths considerably higher than the true glide slope. (AIM 1-1-9.d.4)
2) During certain failures of the ILS system, localizer and/or glide slope indications will center regardless of your position, with no warning flags. (A Quantas flight ran into this several years ago, I think GPWS saved their bacon).

As a side note, the approach we are looking at has a bunch of interesting features: the ILS signal is unreliable inside 1.8 DME, the at or above 2100' restriction over open ocean, 2000' MSA over open ocean, 2400RVR required with a 300' decision height.

Paige

Last edited by PaigeHoffart : 01-18-2015 at 07:11 AM.
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  #15  
Old 01-18-2015, 07:25 AM
MercFE MercFE is offline
 
Join Date: Sep 2014
Location: Maple Valley, WA
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I've always wondered the same thing... But for some reason I have to check that it works on every 737 that I take up for a test flight. LOL

Quote:
Originally Posted by Scott Hersha View Post
Does anybody even use these things anymore? I doubt it. I haven't flown an airplane with a marker beacon antenna in at least ten years. We have an NDB, but its not needed here either. The final approach segment is defined by Glide Scope Intercept as far as I know. If someone ran over that thing with a lawn mower, it may be weeks before anyone even noticed. It should be in a museum.
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  #16  
Old 01-18-2015, 05:22 PM
Charles in SC Charles in SC is offline
 
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Around my part of the country people have things like that in their back yards to dry sheets on.
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