Scout wrote:
several years ago, my son did his engineering internship for the USN,
developing software that analyzed vibration of various on-board machinery in
an effort to provide data via non-invasive means.

What were the results? Cheap temp sensors and automatic logging do
wonders for op-condition analysis. Vibration sensors can't be much more
expenisve.

Anyway I hope your sen had a good time working what I used to call the
gnomes of Mechanicsburg...

DSK