Thanks for that ... which version would best suit the
MPP? I’m guessing the Ultra Light. Though the bigger version is waterproof ... I wonder how deep before you can’t find it?
I have the waterproof version. (.8 oz) compared to (.4 oz), so the weight difference is negligible (less than half an ounce). I've had no noticeable effect on flight while using it and it is part of my pre-flight check to ensure that it is turned on and transmitting.
The waterproof version won't work under water (that's not the intention), as any signal will likely never break the surface and make it out of the water. It will however, survive rainfall, snow drift, and other such circumstances without an issue, giving me 30 days to track down the aircraft, even if it rains for weeks after the craft gets lost. And even if it goes in water in an accident, if you're able to find your quad without the signal, the waterproof version won't be ruined and at least can be used again.
FYI, I've never had to use it, even though I fly with it every flight. Haven't had a situation that would call for it (yet). However, it does give me peace of mind that I could eventually track it down even if lost, allowing me to fly in much more "risky" circumstances as well as piece of mind when it disappears out of range of the RC during long Litchi missions. There are many flights that I wouldn't have flown and many shots that I wouldn't have captured without the tracker, and for that alone, it's been worth the investment.