Context articles:

https://www.cbsnews.com/news/russia-submarine-south-china-sea-philippines-navy-ship-warplanes/

https://www.france24.com/en/live-news/20241202-philippine-president-says-russian-submarine-worrisome

For example how was structural integrity tested and ensured?

In modern times its probably relatively easy but in 1943 off Guam thousands of miles from Pearl and having no access to computes how would they assess damage and structural integrity of hulls or other components after being heavily depth-charged? The process for doing so at sea and at port must've been different but equally important.

We are a First Lego League team. First Lego League is a coding and innovation competition where teams will code and create solutions to current problems, researching them along the way. Our team's problem that was chosen was implosion of submarines. We were wondering if our solution would work, and if any improvements could be made.

Our solution to implosion has two parts. Our first part is preventing implosion itself. We planned to make artificial gills using the process of electrolysis. This would take the outside oxygen in the water and bring it into the sub. This would combat the outside water pressure, allowing the sub to be able to withstand higher pressure from the water around.

The second part to our solution is to combat the air pressure. When humans experience high air pressure, they experience many side effects, which all lead to death. Our solution to this new problem is to create an anti-space suit. This would keep out the pressure, rather than keeping it in. If we were to do this, we would need a strong material, so we decided to use the material tungsten titanium alloy.

We would appreciate feedback of our solution, and thanks in advance!

HII is buying the company I work for, and I'm looking for a resource to get some information on what to expect after the sale is completed.

https://preview.redd.it/1c3qhbyms54e1.jpg?width=500&format=pjpg&auto=webp&s=1e2a95c87b0809314b5cb4645eab9df0291bfb7f

Hi all,

A while ago, I sought help with an experiment for school kids. I've included my previous post here. Noise Cancelation

Based on the feedback, kids experimented with reducing vibration by using different materials to absorb vibration. They started with AC motor but we couldn't get it to work the way we wanted. Instead, we used a grinder that vibrates a lot and put different materials underneath it to see which one reduced the vibration the most. They tested with carpet pad, foam, and rubber mat and found carpet pad to be very effective with reducing the vibration.I attached a picture with the readings. Their explanation is, carpet pad is the least denser compared to rubber and foam so like sound vibration travels less. I have attached the pictures from their experiment. Can someone please answer couple of questions and provide feedback. I feel am not smart enough to tell if their explanation is accurate.

https://preview.redd.it/q1hdpbh5eo3e1.png?width=856&format=png&auto=webp&s=526bc4178805a5451df05372c39c6998f6f64faf

questions

1. Are they correct in their explanation why carpet pad reduced the vibration the most ?

2. What unit is used to measure vibration ? We used vibrometer android app to measure vibration, it doesn't provide any unit of measurement.

3. Any other feedback on their experiment ? Anything additional that would be cool/interesting to experiment with?

https://preview.redd.it/v913vrr5do3e1.jpg?width=4000&format=pjpg&auto=webp&s=66b92613524e5f1ee855905f64acd23f02981dae

https://preview.redd.it/csxwwrr5do3e1.jpg?width=4000&format=pjpg&auto=webp&s=892f8360fe6192244ee6adb761b999a62745146c

https://preview.redd.it/4pq566s5do3e1.jpg?width=4000&format=pjpg&auto=webp&s=6565f519e7fdfb2baf072ad5d9cee392cd843bb6

Hello there! I enlisted into the navy with a STS (SECF) Rating and leave Dec 19th. I wanted to ask, do you go to BESS school before A-school? If so, how does the process look like after bootcamp? Any info and help is appreciated!

I've pretty much (I'm assuming you have too) seen all the content there is available online about Naval combat, Navies, and submarines etc. Whether it's a documentary or a movie. Fiction, non fiction.

But today, I was looking for a documentary about the world war II fleet submarines of the US Navy. (Gato I think was the main class?)

Any recommendations?

Please even if It's obvious recommend it anyway, I might have seen it but I will re-watch.

Thank you.

Most of ya relate

In early 1960's I (an ET) stood sonar watches on a diesel boat older than me. Fast forward 1980's I had a small but mighty sailboat. I always made sure the depth sounder was on while in areas that a submarine might be operating in hope that they could hear it. Can't make a turns count on a sloop rig, and a surprise involving a submarine is often unpleasant for someone.

Was my hope in vain?

Cool Nova documentary....submersible story starts at 15:00

https://youtu.be/AmDhMT8fHEc

I'm currently watching Das Boot yet again and I'm wondering if the noises of the submarine in deep water really have such a long reverb to them or if it's just dramatic freedom.

We were coming off of a very long west-pac with us spending over 90% of our time on station due to other relieving boats bouncing off the bottom and certian terrorists actions going on in the Med. We were about 5 days from San Diego and I was bored and wanted to make things interesting by making up a rumor. The best way to get a rumor started and validated is to tell a nuc non-qual who will normally head aft and spread the rumor.

Again, we were about 5 days from returning to our homeport, I was a senior 2nd, and had been on board longer than anyone else forward of frame 52 and second longest on the entire boat so the new non-qual figured that I knew what I was talking about. I told the nuc non-qual that our arrival was being delayed because squadron couldn't get a band for our arrival (I was standing right outside of radio when I told him this). Sure enough, the rumor spread and the results couldn't have been better. Crewmembers who should have known better were complaining and whining about the delay because of no band. My mission was a success.

Fast forward two years, I've finished shore duty, I'm back at squadron waiting for my new boat to arrive in San Diego. While in the squadron command master chiefs office swapping sea stories I find out that they were actually going to delay the arrival of a boat coming back from west-pac because they couldn't get a band on the pier the day of the arrival. Who knew this was an actual reason?

In the wiki it says the final explosion measured “4.2 on the Richter magnitude scale on seismographs across Europe[33] and was detected as far away as Alaska.[34]”

If that’s true, would CIA/ONI etc have an immediate idea of what it was? I assume we don’t know what our sonar buoys picked up, but I’m curious what might’ve been our first thought?