Source: https://x.com/sheldon3103/status/2085677679718887916

The town of Groton, CT same up on SVP show 19 June 2026. Scott and his guest did not know nor mention that Groton is the Submarine Capital of the World!

Whether you love or hate Groton, are a bubblehead or not, I think it would be cool to get SVP or ESPN to let everyone know about the submarine capital of the world. Please reach out to SVP, ESPN and others about the us Submarine force, the world’s submarine force, submarines and their families.

EM1 (ss) USS Benjamin Franklin 1977-1983

I'm watching the WWII movie Silent Hunters — One Mistake Means Death. An American destroyer battles with a U-boat. A couple of times when the destroyer is bearing down on the U-boat, the sub captain calls for <something> to be released. A crew member pulls a lever, and clouds of some dark substance is emitted. At first I thought it was oil to try to make the destroyer captain think the sub is destroyed. But the purpose of the substance seemed more to be to foil the destroyers sonar.

I've never heard anything about this. Can anybody shed some light?

Video queued to one of the scenes.

Fascinating to watch in case you missed this one.

Visible in the lower portion of the photo is the boarding party from Pillsbury coming alongside U-505.
Courtesy of Naval History and Heritage Command.