2KA wrote, On 9/14/2013 8:56 PM:
I have one, but I haven't had a chance to fly it in the wave yet.

I did try some tests. I carried it very gently over a set of points
separated by about 10 feet, letting it sit for 10 minutes in between
each point. All the points were logged. Conversely, I let it sit at
one point for an hour, shaking it every 10 minutes or so. Only one
point was logged.

I think there may be some logic involved working in conjunction with
the vibration sensor that checks to see if it has been moved.

By the way, it doesn't ever turn off. It just suppresses tracking
messages when it thinks it isn't moving.

inReach has a similar feature, allowing you to specify a circle size
that you have to move beyond before it resumes messages at the tracking
rate. As long as it's inside the circle, it will send messages at
"stopped" rate you can select. I like that - I can turn it on when I
start to assemble, without using up data allotments.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl