# Underwater Tunnels for Submarines **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [August 8, 2024, 1:33pm UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425 "2024-08-08T13:33:04Z")\ **Posts on this page:** 8\ **Page:** 2
**Author:** ![Elmer\_J.Fudd](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/elmer_j.fudd/32/1211_2.png) [@Elmer\_J.Fudd](https://boards.straightdope.com/u/Elmer_J.Fudd)\ **Post date:** [August 9, 2024, 12:24am UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/21 "2024-08-09T00:24:12Z")
The Chinese quite a few underground naval facilities. The one on Hainan Island can accommodate 20 nuclear ballistic missile subs. [![](https://imageio.forbes.com/specials-images/imageserve/5eb1265df66f2f00079eae1e/Map-showing-notable-Chinese-Navy--People-s-Liberation-Army-Navy---PLAN--underground/0x0.jpg?format=jpg&crop=940,529,x0,y9,safe&width=1440) ](https://imageio.forbes.com/specials-images/imageserve/5eb1265df66f2f00079eae1e/Map-showing-notable-Chinese-Navy--People-s-Liberation-Army-Navy---PLAN--underground/0x0.jpg?format=jpg&crop=940,529,x0,y9,safe&width=1440) [Chinese Navy Submarines Are Protected By Underground Tunnels](https://www.forbes.com/sites/hisutton/2020/05/05/chinese-navy-submarines-are-protected-by-underground-tunnels/) ---
**Author:** ![Magiver](https://avatars.discourse-cdn.com/v4/letter/m/4491bb/32.png) [@Magiver](https://boards.straightdope.com/u/Magiver)\ **Post date:** [August 9, 2024, 12:46am UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/22 "2024-08-09T00:46:22Z")
> [@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. ---
**Author:** ![Dr.Strangelove](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/dr.strangelove/32/6613_2.png) [@Dr.Strangelove](https://boards.straightdope.com/u/Dr.Strangelove)\ **Post date:** [August 9, 2024, 12:55am UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/23 "2024-08-09T00:55:15Z")
> [@Elmer\_J.Fudd](#): > > The Chinese quite a few underground naval facilities. One of them caught by satellite: [![](https://media.cnn.com/api/v1/images/stellar/prod/200821122551-china-underground-base-submarine-detail.jpg?q=x_984,y_493,h_619,w_1100,c_crop/h_653,w_1160/f_webp) ](https://media.cnn.com/api/v1/images/stellar/prod/200821122551-china-underground-base-submarine-detail.jpg?q=x_984,y_493,h_619,w_1100,c_crop/h_653,w_1160/f_webp) > **[Satellite photos appear to show Chinese submarine using underground base | CNN](https://www.cnn.com/2020/08/21/asia/china-submarine-underground-base-satellite-photo-intl-hnk-scli/index.html)** > > Military watchers across the internet were provided with a rare sight after photos circulated this week that appear to show a Chinese submarine using an underground base on Hainan Island on the South China Sea. Hard to say how extensive it is, but it does look fairly big. ---
**Author:** ![Smapti](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/smapti/32/17938_2.png) [@Smapti](https://boards.straightdope.com/u/Smapti)\ **Post date:** [August 9, 2024, 1:27am UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/24 "2024-08-09T01:27:11Z")
> [@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. ---
**Author:** ![TheTyrant](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/thetyrant/32/19111_2.png) [@TheTyrant](https://boards.straightdope.com/u/TheTyrant)\ **Post date:** [August 10, 2024, 1:41pm UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/25 "2024-08-10T13:41:28Z")
> [@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. ---
**Author:** ![burpo\_the\_wonder\_mutt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/burpo_the_wonder_mutt/32/365_2.png) [@burpo\_the\_wonder\_mutt](https://boards.straightdope.com/u/burpo_the_wonder_mutt)\ **Post date:** [August 10, 2024, 5:04pm UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/26 "2024-08-10T17:04:49Z")
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. ---
**Author:** ![CalMeacham](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/calmeacham/32/35_2.png) [@CalMeacham](https://boards.straightdope.com/u/CalMeacham)\ **Post date:** [August 10, 2024, 5:41pm UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/27 "2024-08-10T17:41:30Z")
> [@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](https://en.wikipedia.org/wiki/The_Man_Called_Flintstone)** > > The Man Called Flintstone is a 1966 American animated musical comedy film produced by Hanna-Barbera Productions and distributed by Columbia Pictures. The second film by Hanna-Barbera following Hey There, It's Yogi Bear! (1964), it was directed by series creators/studio founders William Hanna and Joseph Barbera from a screenplay by Harvey Bullock and R. S. Allen. > A theatrical spin-off of the 1960–66 television series The Flintstones, and a swan song (series finale), produced immediately following... ---
**Author:** ![burpo\_the\_wonder\_mutt](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/burpo_the_wonder_mutt/32/365_2.png) [@burpo\_the\_wonder\_mutt](https://boards.straightdope.com/u/burpo_the_wonder_mutt)\ **Post date:** [August 10, 2024, 7:18pm UTC](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425/28 "2024-08-10T19:18:49Z")
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. [Previous page](https://boards.straightdope.com/t/underwater-tunnels-for-submarines/1005425.md?page=1)