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Malaysia Airlines MH370: What is a transponder?
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14-03-2014 03:19 PM
Post: #11
Huliwang Offline
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14-03-2014 02:58 PMAnonXymusX Wrote:A transponder is just a device that signals back an identificationt tag, of a given plane, to tower control. Whithout it station control radar can detect the plane but can't idenfify which plane is or to which airline it belongs.
Your explanation of that thing sounds like IFF (Identification Friend or Foe) fitted on our military fighters and ships ..... Laughing

"Like bubbles on a river, sparkling, bursting, borne away”
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14-03-2014 04:02 PM
Post: #12
walaneh Online
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14-03-2014 12:11 PMreiko Wrote:http://www.straitstimes.com/breaking-news/se-asia/story/malaysia-airlines-mh370-what-transponder-20140314

walaneh!
definition for "transponder"!Big Grin

transponder |tranˈspändər| noun
a device for receiving a radio signal and automatically transmitting a different signal.
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14-03-2014 04:13 PM
Post: #13
ah pan Offline
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Quote:4. Is there a way to use it to indicate a problem on board the aircraft?

There are codes for different emergencies. For a hijacking, it's 7500. For communications failure, 7600. Emergencies are 7700.

5. How and why do you turn off a transponder?

There is a switch that you would move from "ON" or "SBY" (standby) or "ALT" (altitude). You could also pull the circuit breaker for the transponder in the cockpit.

see all these little stories, they are coming to an end soon, this goes to show all the experts have ran out of guesses, the closer you look the less you see .... Rolling on the flor laughing

Everything will be alright in the end, so if it is not alright it is not yet the end ....

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(This post was last modified: 14-03-2014 04:14 PM by ah pan.)
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14-03-2014 04:17 PM
Post: #14
Levin Offline
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14min difference? Wow. Getting interesting. Deliberately shutting down transponder......
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14-03-2014 05:30 PM
Post: #15
drgn Online
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14-03-2014 03:19 PMHuliwang Wrote:Your explanation of that thing sounds like IFF (Identification Friend or Foe) fitted on our military fighters and ships ..... Laughing

Actually the full name is "Secondary Surveillance Radar Transponder". It is similar to the IFF system used by Military. Between the 2 there is a common mode so military aircraft can be seen by civilian ATC and visa versa.
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