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Air Traffic Monitoring => Listener Forum => Topic started by: flyMKEmilwaukee414 on April 14, 2006, 03:34:59 PM

Title: Whats on 121.5 MHZ
Post by: flyMKEmilwaukee414 on April 14, 2006, 03:34:59 PM

What kind of goverment is on 121.5 is it like the airport police or a special room for the emergery freqencie? does anyone know




 :D



FLY MKE!

Title: Whats on 121.5 MHZ
Post by: Umop3pisdn on April 14, 2006, 06:19:00 PM

From what i looked up on the internet, "Aircraft Emergency" thats my unofficial answer

Title: Whats on 121.5 MHZ
Post by: stealth71 on April 14, 2006, 07:05:03 PM

121.5, and (243.0 militar, are the standard aviation emergency frequencies used to transmit distress calls. They are monitored by air traffic control facilities. 121.5 is also the frequency used to transmit emergency locator transmitter signals when an aircraft goes down, although that frequency is slowly being replaced and will eventually be in the 800MHz band. ELT's are activated upon hard impacts and begin transmitting a warbling tone that can be triangulated using an ELT locator either on the ground or by search and rescue aircraft flying overhead near the crash site. ELT's can also be activated by a hard landing. At our airport, we occasionally have to get our locator and track down an ELT after a plane has landed hard. It takes a while, but we eventually find the ELT that is going off and reset it.

Title: Whats on 121.5 MHZ
Post by: Umop3pisdn on April 14, 2006, 08:22:38 PM

I was close   :D

Title: Whats on 121.5 MHZ
Post by: digger on April 14, 2006, 08:36:51 PM

You may also hear it (and 243 in the UHF band) referred to as the "guard" frequency. I understand the name comes from the fact that somebody will always be tuned to that frequency--"guarding" it, so to speak.

Title: Whats on 121.5 MHZ
Post by: Tomato on April 22, 2006, 12:35:29 AM

Sorry, what does ELT actually stand for?  It reminds me of the beacon that was used a few times in that cartoon with the flying bear?  :)

Title: Whats on 121.5 MHZ
Post by: davolijj on April 22, 2006, 12:49:08 AM

Quote from: Tomato

Sorry, what does ELT actually stand for?  It reminds me of the beacon that was used a few times in that cartoon with the flying bear?  :)

Electronic Locator Transmitter

Title: Whats on 121.5 MHZ
Post by: Lexxx on April 22, 2006, 09:31:44 AM

I think it's actually Emergency Locator Transmitter

Title: Whats on 121.5 MHZ
Post by: Jason on April 22, 2006, 09:37:31 AM

Quote from: Lexxx

I think it's actually Emergency Locator Transmitter

I believe that's what JD meant.

Title: Whats on 121.5 MHZ
Post by: stealth71 on April 22, 2006, 11:22:21 AM

...and it's in my post above. :wink:

Title: Whats on 121.5 MHZ
Post by: davolijj on April 22, 2006, 11:57:06 AM

Quote from: Lexxx

I think it's actually Emergency Locator Transmitter

Wow, that's the last time I post something after a night shift....I must have had the auto-pilot on when I wrote that one. :?

Title: Whats on 121.5 MHZ
Post by: stealth71 on April 22, 2006, 12:01:21 PM

Well, in all fairness, it is electronic.  :mrgreen:

Title: Whats on 121.5 MHZ
Post by: Tomato on April 28, 2006, 11:51:54 PM

lol... thank you, all!  :)