On Friday, June 21, 2013 12:31:22 PM UTC-7, wrote:




Doesn't having a transponder also alert the Flarm unit/user?


Mike



Mode S will tell every flarm in miles where you are. Mode C is next to useless for flarm, and many flarm people will have turned mode c warnings down/off.



John Cochrane

That is true IF the Mode S or C is operating in an ATC radar environment, or if it is being actively interrogated by a TCAS equipped aircraft. Otherwise, the flarm or PCAS will never know you're there.

That's part of the beauty of PowerFlarm, unlike a transponder, PF is an active system transmitting your position for other PF users to see.

Both PF and a transponder are important if you fly near gliders or powered aircraft . . . it's not a one or the other deal, though depending on where you fly, one might be more advantageous to have than the other, though both is best.

bumper