Re: IJN and sound velocity profile


Christophe Chazot wrote:
Hello, this is a serious question.
I'm looking for information about possible exploitation of sound velocity
profile (SVP) or bathythermography (BT) by the Japanese during WW2.
As far as I know, no IJN surface warship had any device to measure SVP or
BT, and convoy escorts simply ignored sound propagation conditions when they
tried and establish a screen around a convoy, leading to irrelevant position
of sonar-equiped ships. On the other hand, IJN submarines did exploit
temperature gradients to escape from detection, in 1944-45 at least but
maybe earlier. So what ? Did they never exchange their experiences, or did
they but lacked time / means to inforce relevant tactics in surface forces?
Has anyone some relevant info ?

Regards,
Christophe Chazot

The Japanese Submarine Force and World War II says the I-400s and
I-13/I-14 had anechoic coating, suggesting the idea was there.

Later quote "The IJN had very little concern for the protection of
Japanese shipping lanes or ASW tactics and operations. There was no
Japanese navy policy for countering enemy ASW....their lack of fully
modern electronic sensors, slow submerged speed, shallow maximum test
depth and bad manuerverability...made them easy targets for astute ASW
forces"

.

Relevant Pages

  • Re: IJN and sound velocity profile
    ... I'm looking for information about possible exploitation of sound velocity ... profile or bathythermography by the Japanese during WW2. ... and convoy escorts simply ignored sound propagation conditions when ... On the other hand, IJN submarines did exploit ...
    (sci.military.naval)
  • Re: IJN and sound velocity profile
    ... Christophe Chazot wrote: ... I'm looking for information about possible exploitation of sound velocity ... profile or bathythermography by the Japanese during WW2. ... been in place in Germany and Japan, ...
    (sci.military.naval)