PPRuNe Forums - 121.5 Mhz vs 406 Mhz

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- - 121.5 Mhz vs 406 Mhz (https://www.pprune.org/tech-log/281641-121-5-mhz-vs-406-mhz.html)

ATPMBA

26th Jun 2007 12:51

121.5 Mhz vs 406 Mhz

Is the 406 Mhz emergency frequency going to replace 121.5? Will searchers still scan for 121.5?

BDiONU

26th Jun 2007 12:56

Do you mean for SAR beacons? I think 121.5 is going to be the voice channel for a long time to come.

BD

ATPMBA

26th Jun 2007 12:58

Yes, I mean SAR beacons.

BDiONU

26th Jun 2007 13:49

Quote:

Originally Posted by ATPMBA (Post 3377461)

Yes, I mean SAR beacons.

I have no reason to believe that SARSAT and COSPAS etc. would ever switch off 121.5.

BD

snips

26th Jun 2007 13:55

121.5

http://www.cospas-sarsat.org/MainPages/indexEnglish.htm
I think the Sat Postion Fixing Segment will be finished, not sure about homing though.

BDiONU

26th Jun 2007 15:14

Quote:

Originally Posted by snips (Post 3377540)

http://www.cospas-sarsat.org/MainPages/indexEnglish.htm

Ah! Thanks for the link, 1st Feb 2009 then.

BD

Tinstaafl

27th Jun 2007 14:46

Doesn't necessarily mean the demise of 121.5 MHz - only that the *satellites* will no longer use that frequency. Still leaves voice comms & VHF homing using 121.5.

Nocti

28th Jun 2007 13:22

According to the Lifeboat guys, 406 will be the frequency that the only freq that satellites will monitor, but 121.5 will remain in use by the lifeboats and SAR aircraft.

rescue520

29th Jun 2007 05:51

From February 2009 the international satellite system (called Cospas-Sarsat) will no longer process the 121.5 signal. This will make all 121.5 beacons obsolete. Owners of the 121.5 beacon should work towards upgrading to the 406 at their next beacon battery changeover.

http://beacons.amsa.gov.au/

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