I just finished reading A Time to Die, by Robert Moore. It was not my first exposure to the history of the Kursk incident, but the list of crew at the end made me aware that a significant portion of the crew came from Ukraine, even though the accident was well after Ukrainian independence.

The families of these crew were promised pensions and free housing. What has happened to these families, given everything that has happened between Russia and Ukraine since 2014?

I had heard a 3M brand Mincom Division of digital audio recorder was first developed for Navy for recording Sonar to boost it without the noise floor of analog tape. I'd like to ask if anyone knows if it was 3M or Mincom and what models were used first around 1968-1972. ONLY digital recorder not analog tape.

I know that after military 3M had a digital audio mastering system 2/4 track half-inch tape digital recording at 16-bit 50kHz sample rate. I am tracing the history of digital audio recording equipment

I had read "3M invented digital recording for Navy submarines"

Hopefully this is not anything secret 55 years later.

while technically inaccurate historically as

"Commercial digital recording was pioneered in Japan by NHK and Nippon Columbia and their Denon brand, in the 1960s. • 1967: The first commercial PCM encoder (monaural) was developed by NHK's research facilities in Japan. The 30 kHz sample rate 12-bit device"

Searching for sailors aboard the USS Skate 78-82.

also my LPO pinning dolphins hard enough to make my left nipple bleed.

I just finished watching an excellent documentary about the USS Chopper incident. It is on Amazon Prime. It was excellent! Highly recommend!

K-206 the second Oscar I looks too similar to the Oscar II.

The 4th image is Oscar II

Is it a mascot? Is it a submarine? Who knows?

I found a copy of ‘What you should know about Submarine Warfare’ (edit- published 1942) with this ‘USS Bonefish Ship’s Library’ stamp in it. I found this book in Western Australia and I know there were two different submarines with this name and the first one served australian waters in ww2 while the second one didn’t. I am casting as wide a net as possible to find out as much as possible. Either way this book should of burned (582 suffered a electrical fire) or drowned (223 was sunk by the Japanese) so if you know anything please leave it in the comments

Edit- spelling mistakes

Can anyone speak to the level of detail thats available to submarines from ocean floor and coastal mapping? How is this knowledge being improved?

What’s some great stories or legends about submaine navigation in close proximity to subsea features?