Re: IJN and sound velocity profile


"Mark Test" <MARKT38@xxxxxxxxxxxx> a écrit dans le message de news:
jAA4g.11232$Es3.1748@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
"Christophe Chazot" <c.chazot@xxxxxxxxxx> wrote in message
news:44526275$0$6686$8fcfb975@xxxxxxxxxxxxxxxxxx
(snip)

Question: Have you been able to find out if any WW2 ships / submarines
even had bathythermograph's onboard?

Yes, US submarines had BT = Bathythermograph, in 1944-45, and they used
layers to determine their attack or approach lane. And Germans did know that
temperature layers could hide them, they did use it extensively in the Med
in 1942 where there is often a layer, they did not need any BT, just an
external thermometer.
But I've never read anything like that about IJN subs. That's why I suspect
that they had no idea of it.

Christophe



I would argue it was the threat of the Soviet submarine force that
drove our understanding of acoustics, not U-boats in WW2, and of course
the IJN blew off ASW all together....suggesting they knew nothing of
acoustics
or underwater sound propagation.

The following quote supports the fact that Acoustics is a new science...

Mark

...[A]coustics is characterized by its reliance on combinations of
physical
principles drawn from other sources; and that the primary task of modern
physical acoustics is to effect a fusion of the principles normally
adhering
to other sciences into a coherent basis for understanding, measuring,
controlling, and using the whole gamut of vibrational phenomena in any
material.
Origins in Acoustics. F.V. Hunt. Yale University Press, 1978






.