On Wednesday, February 5, 2020, 11:17:52 PM PST, grarpamp
   <grarpamp@gmail.com> wrote:

   On 2/6/20, jim bell <[1]jdb10987@yahoo.com> wrote:
   >
   [2]https://www.reuters.com/article/us-usa-nuclear-pentagon-idUSKBN1ZY2E
   Q
   > Jim Bell's comment:.  So, the Russians are complaining about
   low-yield
   > nuclear missiles.  So, what should we do?  I know, call them and
   reassure
   > them:. "Okay, we've replaced the micros with 1 megaton babies.  Feel
   better
   > now, Ivan?".
   [3]https://en.wikipedia.org/wiki/Hydroacoustics
   infohash:60B3EC5EE26FCA234DA34EC7153444E876F3C29A
   No espionage missions have been kept more secret than those involving
   American submarines. Now Blind Man's Bluff shows for the first time
   how the Navy sent subs wired with self-destruct charges into the heart
   of Soviet seas to tap crucial underwater telephone cables. It unveils
   how the Navy's own negligence might have been responsible for the loss
   of the USS Scorpion, a submarine that disappeared, with all hands
   lost, 30 years ago. It tells the complete story of the audacious
   attempt to steal a Soviet submarine with the help of eccentric
   billionaire Howard Hughes, and how it was doomed from the start. And
   it reveals how the Navy used the comforting notion of deep-sea rescue
   vehicles to hide operations that were more James Bond than Jacques
   Cousteau.
   [snip]
   Somebody in the early 1980's said to me that "If you want to see
   American attack submarines  converge on the Straight of Juan de Fuca
   (near Seattle), just immerse a hydrophone into that water, and emit
   sound at a frequency of 50 Hertz,

References

   1. mailto:jdb10987@yahoo.com
   2. https://www.reuters.com/article/us-usa-nuclear-pentagon-idUSKBN1ZY2EQ
   3. https://en.wikipedia.org/wiki/Hydroacoustics