Machinbird,
http://www.pprune.org/tech-log/449639-af-447-search-resume-part2-20.html#post6422330
With the number of EEs looking at this thread, I'm sure the darts will be flying if it won't work. Fire when ready.
BEA should test! Could be done in few hours at lab. (low water pressure)
Considerations:
1) If you transmit high power pulses and listen after a short burst you may be able to detect.
2) I send you a "DART WITH KUDOS" for your feeling!