boat with submarine at bottom

[jamesmatheson]

Hi all ive been asking around to have a boat made with a tube that goes down maybe 10 or 20 feet
with a submarine attached to the boat

the reason its attached with a tube is so people dont need oxygen tanks

I hope someone can help me with this

Its very needed where i live

i hope you like what i share

 

[HelmutSheina]

Hi James, the details are a bit vague here, but boat mounted compressors used to supply air to divers are in common usage.

How about more of an explanation of what you want to achieve with pictures or diagrams?

 

[jamesmatheson]

Hi James, the details are a bit vague here, but boat mounted compressors used to supply air to divers are in common usage.

How about more of an explanation of what you want to achieve with pictures or diagrams?

Thank you
This is something needed everywhere to see underwater while having safety

 

[SolGato]

They already exist:

Company Unveils EGO-SE 450 'Penguin', a Personal Semi-Submarine Boat

Now that you've seen the world's most luxurious Las Vegas villas / suites, Maldives resorts, first class airplane suites, private jets, and iPhone 5 handsets, it's time to check out the EGO-SE 450. This luxurious semi-submarine (entire craft does not go underwater) enables you to explore the...

www.techeblog.com

 

[montero]

History — Aquaspace Bonaire

Learn about the history of Aquaspace. Built by Jacques Rougerie between 1978-1982, this unique trimaran started as a floating aquarium for marine research and now offers extraordinary sailing adventures.

www.aquaspace-bonaire.com

 

[bajansailor]

Welcome to the Forum James.

How about a 'simple' (ha!) second hand glass bottom boat?
Listed below are a couple for sale.

https://henri-captain.com/boats/glass-bottom-looker-32-feet-aluminium-320-hp/

37 Paritetboat Looker 2020 Fort Lauderdale | Denison Yacht Sales

Looker Boat for Sale is a 37' Boat built by Paritetboat in 2020. Currently she is located in Fort Lauderdale and awaiting her new owners.

www.denisonyachtsales.com

Newton Boats build a GRP glass bottom boat - there is one of these in operation here at a Sandals resort, and it seems to be quite effective at doing what it says on the tin.

http://www.newtonboats.com/36glassbottomboat.html

 

[gonzo]

Is there a reason it has to be so low? Glass bottom boats are common. If you also want to have some view to the sides, a deeper box keel would do the trick.

 

[kapnD]

This is an interesting topic, but need a more detailed SOR to start discussion.
A catamaran with an extendable /retractable center nacelle might be more friendly in terms of draft.
How deep does the pod need to go?
How big a boat are you envisioning?
Does the support craft need to be able to cover much distance or operate in rough water?

 

[rnlock]

Air tanks, not oxygen tanks. Oxygen tanks would be more trouble and more expense. Plus they'd be a bit more dangerous. A lot more dangerous below 25 or 30 feet.
---------
Such a boat would need a lot of weight to hold down the pod. Getting out should be very easy, in case a window breaks. It might be useful to make the pod retractable. Not a lot of docks have 20 feet of water right next to them. Plus, retracting the pod would save a bunch of fuel if the boat had to go any distance. Hydrostatics, i.e. stability, might be interesting with the pod extended.

 

[montero]

Why is oxygen more dangerous below 25 feet ?

 

[gonzo]

Why is oxygen more dangerous below 25 feet ?

It is toxic and will kill you.

 

[montero]

So, I won't be exceeding 30' with my 7.5m catamaran. It's not designed for that purpose, but it wouldn't hurt to play around a bit.

So, I need to assess the possibility of neutral longitudinal trim...

 

[rnlock]

Why is oxygen more dangerous below 25 feet ?

If you get too much oxygen, it can cause convulsions. At 32 feet down, in seawater, a diver breathing pure oxygen at ambient pressure gets about ten times as much oxygen as he'd get breathing air at the surface. If the pure oxygen is filling a room at normal atmospheric pressure, that's a fire hazard requiring careful design to mitigate, and maybe even special clothing for anyone in there. Apollo 1 had pure oxygen in the capsule, at a little over one atmosphere, when the infamous fire started.

 

[portacruise]

My guess is that a design where the submarine part hinges and folds flat with as low resistance as possible against the floating superstructure would be more practical all around. Folded it could better handle the low draft situations and have much less hydrodynamic friction, so more efficient propulsion when needing to be moved quickly or to distance. When unfolded and deployed vertically for observation mode, the bottom sections below the observation area could be flooded to provide stability (countering the upward forces) without weighing down or having to somehow compensate with changes to the superstructure above. Retractable might raise the center of gravity (of the floating part) and reduce stability, unless compensated somehow with changes to superstructure above. JMHO.

 

[wet feet]

Have you considered a SWATH type?