Hint: Ask your AW if he can ever see airplanes on a sonobuoy. If the
answer is yes, consider that the submarine has a lot more hydrophones
than the buoy does.

Tough to do since I've not seen an AW in about 25 years! :-)

Still, I never saw a trace of a Stoof, nor did I ever hear us passing
over our own bouys. Never tried in the P-3.

Fred is right here, Bill. At the ASWOC on Dodge, we had to do training
("What kind of training?" "Acoooooustic Training, SIR!") and one of
our exercises was recognizing transients, including overflights of
buoys. The P-3 passes over quickly, so there was a noticeable doppler
shift and a somewhat discreet frequency that related to the [deleted]
- for heloes, it was more of a gigantic increase in broadband
background noise, until they dipped. Then you can ---

sound of window glass breaking, flash/bang detonation, muffled
screams