Underwater Tunnels for Submarines

[Elmer_J.Fudd]

The Chinese quite a few underground naval facilities. The one on Hainan Island can accommodate 20 nuclear ballistic missile subs.

Chinese Navy Submarines Are Protected By Underground Tunnels

[Magiver]

@X.L.Lent

I have always wondered how one would navigate through such a tunnel.
Submarines usually don’t have windows so how do you keep from running
into the sides of the tunnel?

The Russians have windows in their submarines. It’s so they don’t have to navigate on the surface exposed to the cold weather. They’re not pressurized and the room fills will water when descending beneath the waves.

[Dr.Strangelove]

@Elmer_J.Fudd

The Chinese quite a few underground naval facilities.

One of them caught by satellite:

Satellite photos appear to show Chinese submarine using underground base | CNN

Hard to say how extensive it is, but it does look fairly big.

[Smapti]

@dorvann

How Naboo couldhave an underground ocean that big and remain liquid seems to defy the law of physics as we know them.

A Jedi did it.

[TheTyrant]

@John_DiFool

A more modern sub will have very high frequency sonar, usually used to detect mines but would prove useful in such a passageway.

It’s an interesting question. I’ve worked on submarine sonar my entire adult life, including a fair amount of time in HFA integration. I’m not entirely certain how well it’s going to work in a completely-enclosed tunnel–just isn’t something it’s designed to do. You might be able to creep through a tunnel using it…

(I’m not gonna be onboard though.)

My biggest concern would be currents as the tide comes in and out. You’re gonna get yourself Austin Powers’ed in there.

[burpo_the_wonder_mutt]

After extensive and exhausting research in front of the DVD player, I have discovered that the Jonny Quest episode, Pirates From Below has a secret underground submarine base accessible from the sea. It also has a couple continuity flaws involving said sub base and the large sub, two mini-subs and hovercraft inhabiting the joint.

Don’t quote me, but I remember an episode of The Flintstones spoofing the James Bond movies (do you recall Madam “I’m too important to be captured” Yes?) and I believe there was an underground sub base, but someone else will have to verify this as I don’t have access to Flintstone DVDs.

[CalMeacham]

@burpo_the_wonder_mutt

Don’t quote me, but I remember an episode of The Flintstones spoofing the James Bond movies (do you recall Madam “I’m too important to be captured” Yes?) and I believe there was an underground sub base, but someone else will have to verify this as I don’t have access to Flintstone DVDs.

Are you sure this wasn’t the feature film The Man Called Flintstone, released right after the series ended, and with a secret agent plot?

I saw it when it first came out, but remember very little of it. Looking through the Wikipedia page, I don’t se anything about an underwater submarine base.

The Man Called Flintstone

[burpo_the_wonder_mutt]

Nope, never saw Man Called… . The episode I was referring to is fifth season, Dr. Sinister (I just now found it on Tubi); sadly, there is no submarine base, but the bad guy’s lair is inside a dormant volcano.