I should point out that leaving your transponder on in a contest or gaggle does NOT make PowerFlarm useless as some believe. Mode C alert and flarm alerts look and sound completely different. It is easy to ignore mode C alerts in a thermal, they are not too intrusive, you will not confuse them with the long loud collision alarm and red blinking screen that a flarm collision alert produces. So please do not turn off your transponder under any circumstances.

Ramy