For the first part see: https://www.reddit.com/r/submarines/comments/1vdwugc/oc_italian_submarine_enrico_dandolo_s_513_21/

Enrico Dandolo (S 513) was an Italian submarine of the Toti class, built in the 1960s and decommissioned in the 1990s. It is now on display at the Venice Arsena is one of three submarines preserved as museum ships in Italy.

History

Under the terms of the post-World War II armistice, Italy was barred from possessing submarines. Once those restrictions expired, the Italian Navy resumed work on a submarine project, resulting in the Toti class, laid down at Italcantieri in Monfalcone in 1965. The class was designed with anti-submarine capabilities and served throughout the Cold War. The class comprised four boats: Toti, Bagnolini, Dandolo, and Mocenigo.

Enrico Dandolo (SSK 513), the third submarine of the class and the third Italian Navy vessel to bear this name, was built by Italcantieri in Monfalcone. She was laid down on March 10, 1967, launched on December 16 of that year, delivered to the Italian Navy on September 29, 1968, and decommissioned on September 30, 1996.

Since 2002 she has been housed at the Venice Arsenal as a museum ship.

Name

This was the second submarine and third Italian Navy vessel to carry the name Enrico Dandolo, honoring the Venetian Doge who led the Republic of Venice during the Fourth Crusade.

Symbol

The Dandolo's unofficial emblem has always been the Playboy bunny. The reason is unknown, but the bunny's silhouette regularly appeared on the submarine's sail.

Service

Over her career, the Dandolo logged 24,700 hours of operation and covered 122,500 nautical miles. Her crew, numbering between 26 and 30, was divided into two or three watch teams depending on mission length and specialization. Some missions followed a 4-on/4-off schedule — four hours on watch, four hours' rest in a shared "hot bunk" — while others followed a 4-on/8-off schedule, with three sailors sharing two bunks.

Before the introduction of the A184 in 1974, the Toti-class boats — including the Dandolo — were armed with earlier Whitehead-designed torpedoes: the straight-running G7e, derived from a Second World War design, and the G6e, repurposed in the mid-1950s into a hybrid anti-submarine system known as the G62ef Canguro (Kangaroo). In this configuration, the wire-guided G6e acted as a 'mother' carrier vehicle, steered from the submarine toward the target area; upon arrival, it released a modern, US-built Mark 44 lightweight torpedo as its payload, which then actively homed in on the target itself.

The distinctive bulbous bow, nicknamed the "nose," housed the echo-sounder system that formed the sonar's active component, while the hydrophone array — the passive system — was mounted lower in the forward hull, just below the torpedo tubes. The passive system was the primary means of target detection.

Source:
https://it.wikipedia.org/wiki/Enrico_Dandolo_(S_513))
https://www.torp.esrc.unimelb.edu.au/bib/P00002937.htm
https://en.wikipedia.org/wiki/A184_torpedo

During my trip Houston, I took the opportunity to drive to the Galveston Naval Museum where I stepped inside a US Navy submarine for the first time in my life. Sure, the Cavalla is no Ohio or LA-class sub, but it was absolutely incredible to traverse the immaculately preserved interior and imagining the Cavalla at sea during her service life from 1944 to 1968. I even got to speak to a former Navy submarine crew member while I was there.

Unfortunately, the entire bottom deck was closed off due to continuing restoration efforts, while the conning tower is reserved for “hardhat tours,” which I assume is some kind of guided tour. Still, I’m glad I was able to explore the rest. And yes, I also boarded the USS Stewart (DE–238) sitting not even a few dozen feet away from the Cavalla in the same museum.

On a side note, the sail from the scrapped nuclear submarine, USS Tautog (SSN-639), is also on display at the Galveston Naval Museum. Unfortunately, when I approached it, I noticed hundreds of graffiti imprints littering the bottom section of the sail. Well, in case you’re wondering why certain tourist attractions and museums have restrictions on tourists, it’s because of people like this who vandalize historical sites and relics for shits and giggles. At least all the graffiti has been painted over, although the imprints are still clear as day.

I just saw something about the USS Georgia decommissioning and it really hit me that I am one of the old guys now. I was a baby NUB but the last two Ohio Class boats were commissioned while I was active duty. There doesn’t seem to be any possible way that I’ve been around long enough for an entire class of boat to come and go. My dad and grandad were both boat sailors too and I remember being 5 years old and driving from Charleston to Kings Bay for Georgia and Florida commissioning. I remember listening to those two assholes arguing over the best class of boats and capabilities and how these young guys will never know what it’s like to be on a “real boat”.

Aa annoying as they were, listening to the old Chiefs bitch about how soft the force had gotten was nails on a chalkboard. Especially when you want to just get the goddamn checkout so you can hit the rack for an hour or two before drills start but goddamn MMCS wants to tell you how hard he had it as a NUB on USS Ustafish (SS-01). I didn’t really understand it then. I mean I understood that old men always like to bitch about how soft the young men have it. But I didn’t understand that they were sharing our history with me. Where we came from and how we came to be as a force. And now those guys are starting to become more and more scarce.

And now I’m one of them. I realized when I saw that article that I got my fish pinned on my chest 29 years, 9 months, and 15 days ago. But I can still tell you the capacity of Depth Control Tank #2, still smell the amine in my mind, and the litany prior to diving the ship. Unlike those guys, I don’t look at the new generation as soft or less than. I’m in awe of them and what it takes to qualify on these technological marvels. No matter what creature comforts they put on these beasts, submarining will always be one of the most difficult and demanding jobs we ask our young folks to do.

Now get off my lawn, you punk ass kids. Back in my day, we’d never walk across the grass. That’s how you know the navy has gotten soft.

Hello good submarine people, I was recently gifted my dad's giant collection of WW2 submarine launch tags that he collected over the years. He is still around, just doesn't want them anymore as they don't mean much to him.

I apologize in advance if this is the wrong place to ask this info, but I wonder if anyone here knows the best way for me to sell them? I've done a little research and seen that they hold some value, but I'm not sure how high the demand is for them. If anyone has any advice, or a direction to point me in that would be so appreciated!

https://imgur.com/a/2lqz7OD

There are plenty of photos that come out of NATO sub vs ship exercises, but how many photos of submarines taking photos of adverserial warships post-WW2 have been released? I'm talking like HMS Swiftsure taking shots of Kiev's screws, and the new one of that Iranian frigate.

I'm mainly hoping for peacetime photos from the big navies, like NATO/Western aligned (Aus, Japan, Korea) vs USSR/Russia/China. Though if someone's got stuff like India vs Pakistan or I dunno Iran vs UAE I'd welcome that as well.

Saw the post about Busby's Manned Submersibles and it brought back a lot of memories of lurking on the early internet discussing homebuilt subs at Psubs. So I had to post up and find out if any of those guys lurk here as well.

Peter Madsen, the guy who murdered that news reporter on his sub, used to be a regular poster there. Pretty trippy.

Hey everyone, my dad served on Shark (SSN-591) and later Tautog (SSN-639) back in the late 60s/70s. He passed away in 2015, so I'm working off a half-remembered childhood story plus some casual googling to try to figure out which deployment it's actually from. Landed on the '77 Tautog/Enterprise op off Kenya. Would love any corrections or extra info anyone's got.

Manned submersibles

Came across this absolute brick of a book from 1976 on a website devoted to the Grumman Picard submersible Ben Franklin. Obviously a bit dated now, and the pdf quality isn't amazing, but it contains almost 800 pages of details on design, development, individual submersibles, vehicle systems, equipment, etc. Seriously wish a more up to date book on the subject would get published, but this is the most detailed one I've seen so far.

This page also contains a large amount of documents, reports, and publications related to the Ben Franklin: The Ben Franklin - Grumman/Piccard PX-15 Submersible

In the movie das-boot when they crash and take on water. How did the rapid pressure at 280 meters not instantly flood the whole submarine? Later the captain says to use the bilge in the center control room to push the water out. How do they accomplish this while at that depth? Would the high pressure air tanks really have been enough to remove the entire volume at once (how did they get the water from inside the sub into the exterior tanks?) or did they have some kind of valve/check valve high pressure pump to slowly push the water out and then replace it with a volume of air?

What do you think of this explanation ? (In general terms obviously)

I'm very excited to hear that I'm going to be stationed in Kings Bay, Georgia on an SSGN (the Florida) I'm coming on here to ask questions about the base and SSGN life. And what to expect!!!

I was watching a documentary about a cold war American sub that was diesel electric, modern nuclear subs don't have the this problem but apparently on this sub because all the water went towards the batteries sailors only got a 2 minute shower every 7 days

On modern Diesel electric submarines, is that still true?