If it's the one in California it's an original VAST sub manufactured by Kittredge, an early version of the K250. It's a rare sub as it wasn't an amateur version built from plans.

I have a PDF of blueprints and construction plans if that's what you're asking.

@@brianhughes2446 ah ok, are the plans for sale anywhere?

@@jackcavendish8900 send me a PM and I'll send u a copy. Use the link on the site. www.Tehom.net

@@brianhughes2446 Wildo, thanks a lot

Alas, probably not. The hot ticket right now are the very high-end subs for sale like those from Triton and buyers mostly have their own crew learn directly from Triton. Many of the tasks that use to be performed by small submersibles have been taken over by ROVs.

I've been diving a few times, but decided to move to a submersible. Www.tehom.net

I talked to Captain Kittridge several times in the early 1990's. He was a great resource and very generous with this time.

​@@BlueSwallowAircraftHe was really smart. I worked for him in high school 1986 and 87. Nice man too.

the k350 i believe is 300'

100meters

Yes, but I bought a submarine to continue my adventures. www.tehom.net

he had a heart attack ya nimrod

Henry Lu nope - US

Because it felt like becasue thats victorias slogan

Dathan Williamson Go to Psubs.com and poke around. The sub featured on the splash page is a K250, a smaller version of these two. How long you stay down depends on your CO2 scrubber and battery power. It's possible to stay down for hours. As per price to build, there are many variables including how much of the work you can do yourself. They occasionally come up for sale which is also a good way to obtain one. Plans for a K350, like the two in this video, are available on the site. If you subscribe to the email group you'll find all sorts of helpful advice.

"Soft" in that they are a half an inch of fiberglass. Open on the bottom, though some models are semi closed by owners. Google "Persistence K350." The design has been certified A+ by Lloyds of London and works well. The first design was called a Vast and the main tanks were mounted on the interior wall. Designer was a WWII sub captain and that's what he was used to. A Naval Academy engineering grade, he modified later designs with the fore and aft external tanks. All the weight is on the bottom, including the lead batteries. With the main ballast tanks all the way at the top, they are very stable in rolling seas, not likely to tip over.

Brian Hughes what I meant by "soft" was soft vs hard tanks. Where hard tanks have valves at the top and bottom and are most commonly used as trim tanks. Or soft, which are usually used as main ballast tanks.

+OmegaMolecule Outstanding! How far along are you?

Not very far yet, I am going to do a build series on my youtube channel of it's construction. I have bought the plans and sourced the materials. Built and wired a shop at my house, also built a cradle for the pressure hull. I am pretty close to starting on the hull. Ask anyone who knows me this has been an obsession of mine since I was a kid.

+OmegaMolecule Mark and I have been diving together since the early 70's. He took a piloting class with Kittredge in the late 70's and was hooked. He sold his K250 and bought the one used for classes. I bought the other one for search and recovery. They are docile subs and fun to dive! If you want to dive a 350 contact Mark.

OmegaMolecule is it finished?

OmegaMolecule ; are there plans you can get for these, or a kit? I'm interested.