ping frequency of black boxes

Today’s story on flight MH370 is that pings got picked up by a Chinese ships. Blackboxes seem to emit a signal every second for a couple of weeks.

Maybe it would be better if these devices would send a ping not every even second. Technically it should be easy to give black boxes a fix random
ping frequency. I probably would help that the device you are looking for emits a ping every 1.345 seconds.

And bigger batteries are probably a good idea as well.

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