Titanic submersible

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Titanic submersible

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  • #649193
    Hopper
    Participant
      @hopper

      So as not to hijack the other thread HERE relating to the original Titanic disaster, thought I would open a separate thread, as the topic of the missing submersible Titan has come up several times.

      Yes we are all hoping the vessel and occupants are found soon. Dramatic times.

      Interesting to compare the thread on Artie Moore's reception of the Titanic's distress signal in Wales and what a big deal it was in 1912 with today's communications where ordinary people worldwide are following it live online. t

      Equally interesting are the technical details of the vessel that are emerging. From it being controlled by a video game hand console to its NASA-related carbon fibre pressure vessel capable of withstanding depths greater than a submarine, some 3,800 metres or 12.500 feet. Water pressure down there is a phenomenal 6,000 PSI.

      But it does seem a little kind "homemade" when you read THIS article about the seven emergency ways the Titan has of surfacing, dumping sandbags, discarded old lead pipes, disconnecting the "legs" and so on.

      The other question I have is that if they have done one of these things and are sitting topside somewhere unfound in the Atlantic, which is one possibility, why is there no mention they would have an EPIRB — Emergency Position Indicating Radio Beacon to guide rescuers to them. Every tin dinghy around here is required to carry one by law but no mention of one for Titan so far. Of course it would be no use if they are stuck under water where radio waves will not penetrate, which they may well be. But just thought it odd that there is no mention of it if they do make it topside, which hopefully they will today or tomorrow. Here's hoping.

      Edited By Hopper on 21/06/2023 12:22:07

      Edited By Hopper on 21/06/2023 12:25:29

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      #37252
      Hopper
      Participant
        @hopper
        #649195
        Robert Atkinson 2
        Participant
          @robertatkinson2

          You have summed up my opinion of the sub. Very "maker" rather than engineered. On beacons yes it should have a EPIRB abut also it could / should have an acoustic "pinger". These are ultrasonic and can be picked up by speciaised sonar. Basically a bigger version of those fited to aircraft accident recorders.
          A very unfortunate event.

          Robert.

          #649196
          Michael Gilligan
          Participant
            @michaelgilligan61133

            This may be a little more informative than a U.K. ‘Red-Top’ tabloid: **LINK**

            https://www.livescience.com/planet-earth/rivers-oceans/missing-titanic-submersible-what-do-we-know-about-oceangates-titan-sub-disappearance

            MichaelG.

            .

            P.S.  __ personally, I wouldn’t worry too much about the use of a ‘cheap game controller’ … these things are user-tested to extremes, and it is likely to be reliable: many of the custom-built components will be higher-risk.

            I do note, however, that it is described as ‘modified’ …

            Edited By Michael Gilligan on 21/06/2023 13:21:28

            #649215
            Samsaranda
            Participant
              @samsaranda

              One thought concerning the crews problems is that if the Titan manages to surface, perhaps some distance from the mothership, there is no way that the crew can open the submersible from inside because part of the departure procedure is that the entrance to the craft is securely bolted from outside prior to entering the water. If the submersible surfaces without someone undoing all the securing bolts then they could still suffocate because they can’t access fresh air.

              In the information now coming into the public domain is that a previous team member was tasked with carrying out a quality audit of the submersible he came up with the fact that there was no Non Destructive Testing Procedures to monitor the structural integrity of the pressure hull, he was subsequently dismissed from his employment. I realise that all sorts of conspiracy theories will emerge because of media speculation, but having spent eleven years as an NDT technician the comment that I read seemed to be particularly relevant. Dave W

              #649217
              speelwerk
              Participant
                @speelwerk

                Sorry for the persons on board but I do not grasp the fascination people have with the Titanic. Niko.

                #649218
                Bill Phinn
                Participant
                  @billphinn90025
                  Posted by speelwerk on 21/06/2023 15:06:59:

                  I do not grasp the fascination people have with the Titanic. Niko.

                  For starters:

                  • World's largest ship [at the time]
                  • Maiden voyage
                  • Second largest loss of life in a single ship sinking [at the time]
                  • Lots of mega rich big wigs on board
                  • Hubris [of saying the ship was unsinkable] immediately punished

                  Edited By Bill Phinn on 21/06/2023 15:16:52

                  #649219
                  Robert Atkinson 2
                  Participant
                    @robertatkinson2

                    They say that the sub uses "active" monitoring for defects." Real Time Hull Health Monitoring (RTM) ". They also say " The use off-the-shelf components helped to streamline the construction…"

                    https://oceangate.com/our-subs.html

                    I don't think off the shelf and "deepest diving" go together. As I said above it looks more "maker" and less engineered. If there is an investigation I'm sure the regulatory aspect will be looked at closely. They don't mention "tours" or "passengers" on their website just crew. This sounds like the low end aviation people who try to circumvent the reqirements for carrying paying passengers by saying they are taking a test flight and have paid a non-refundable deposit or similar. This has beeen stopped in many countries.

                    Robert.

                    #649222
                    Bill Phinn
                    Participant
                      @billphinn90025
                      Posted by Robert Atkinson 2 on 21/06/2023 15:22:43:

                      I don't think off the shelf and "deepest diving" go together.

                      Nor do constructing a deepwater submersible and saying "we did this extremely fast".

                      #649225
                      Anonymous

                        An aircraft claims to have detected undersea sounds

                        #649232
                        Howard Lewis
                        Participant
                          @howardlewis46836

                          Let's hope that the aircraft HAS, and thatm nrescuers can nget there in time to save the occupants.

                          Howard

                          #649235
                          Neil Wyatt
                          Moderator
                            @neilwyatt

                            I'm incredulous that there isn't some sort of time-delayed automatic release of ballast weights accompanied by automatic beacons. All with redundancy built in.

                            Neil

                            #649240
                            mike T
                            Participant
                              @miket56243

                              The French research vessel, Le Atalante, has just arrived on site. It is equipped with a deep diving, remote operated vehicle (ROV) called Victor 6000, that can reach the depths of the Titanic’s shipwreck. This is the first (and only) asset to arrive, capable of reaching the seabed and conducting a sea bed search.

                              Bon Chance

                              Edited By mike T on 21/06/2023 17:06:18

                              Edited By mike T on 21/06/2023 17:06:57

                              #649244
                              Dave Halford
                              Participant
                                @davehalford22513
                                Posted by Neil Wyatt on 21/06/2023 16:43:59:

                                I'm incredulous that there isn't some sort of time-delayed automatic release of ballast weights accompanied by automatic beacons. All with redundancy built in.

                                Neil

                                Even so passengers crew being bolted in from the outside bobbing about on the surface will still result in the air running out just the same

                                #649258
                                Ady1
                                Participant
                                  @ady1

                                  Apparently it costs about £200k for a seat

                                  #649271
                                  SillyOldDuffer
                                  Moderator
                                    @sillyoldduffer
                                    Posted by Neil Wyatt on 21/06/2023 16:43:59:

                                    I'm incredulous that there isn't some sort of time-delayed automatic release of ballast weights accompanied by automatic beacons. All with redundancy built in.

                                    Neil

                                    Part of the problem may be the extreme pressure nearly 4km under water – about 5500psi.

                                    An automatic beacon would have to cope with the same, which is quite a challenge in itself. A crush-proof sealed container containing a battery and transmitter that detaches at the right moment, rises 4km to the surface, and then works!

                                    Descriptions of the submersible don't seem reliable at the moment – lots of conjecture – but it does seem to have been fitted with ballast release systems. If so, I feel the most likely cause is the hull imploding, perhaps due to a fatigue crack, or accidentality smacking a window into the wreck or sea-bed. Hope not.

                                    Fatigue must be a major hazard. Each trip, the hull is compressed and then decompressed between 14 and 5500psi. Comet airliners broke up after undergoing far smaller pressure cycles due to a minor design oversight – sharp window corners! The submersible seems to have a carbon-fibre hull between Titanium domes. Carbon-fibre is immensely strong, but I don't think cracks can be detected as they are in steel.

                                    At least they were all volunteers.

                                    Dave

                                     

                                     

                                    Edited By SillyOldDuffer on 21/06/2023 18:24:20

                                    #649273
                                    Fulmen
                                    Participant
                                      @fulmen

                                      – Hey, let's take an experimental submarine called "Titan" to the wreck of the Titanic. What could possibly go wrong?

                                      #649275
                                      Ady1
                                      Participant
                                        @ady1

                                        An awful lot of risk to see a grave

                                        It must be one of those bucket list items that some people have

                                        #649284
                                        noel shelley
                                        Participant
                                          @noelshelley55608

                                          There were it seems numerous ballast release systems, one had a 16 hour fixing that would disolve ! Fancy having no way to escape from the vessel unaided once on the surface ! I fear that a catastrophic hull failure has occured. God rest their souls. Noel

                                          #649293
                                          Chris Pearson 1
                                          Participant
                                            @chrispearson1

                                            I struggle to sympathize with those involved because I think that Titanic should be left alone – it is a grave.

                                            I would no more go to sea in one of those prototype vessels than one of Elon Musk's (or similar) space rockets.

                                            In one of her brightest moments, Mrs P has asked why they did not have two submarines so that the second could go to the aid of the first should the need arise.

                                            ETA: before anybody says anything, no I would not go to sea in a space rocket.

                                            Edited By Chris Pearson 1 on 21/06/2023 19:04:00

                                            #649296
                                            Bill Phinn
                                            Participant
                                              @billphinn90025
                                              Posted by Chris Pearson 1 on 21/06/2023 19:03:10:

                                              I struggle to sympathize with those involved because I think that Titanic should be left alone – it is a grave.

                                              I thought visiting graves was an acceptable everyday occurrence.

                                              #649297
                                              JasonB
                                              Moderator
                                                @jasonb

                                                Releasing ballast won't bring it to the surface if it is holed, (bit like dumping sand out of a hot air ballon with a hole in it) it only makes it more boyant if it is full of air.

                                                It would need somthing like lifting bags that could be filled with a bottled gas to bring the weight up.

                                                #649298
                                                Buffer
                                                Participant
                                                  @buffer

                                                  An American journalist who went to the titanic said it has 7 ways to surface and one of those will work even if the crew are unconscious so maybe it is snagged on debris. Another fella on the news this morning said his sub was caught in a current once and got wedged up by the propellers. He thought he was going to die for a few hours but they managed to unwedge it. Seems utterly crazy to me though going down there I wouldn't even get in that thing on the surface.

                                                  #649300
                                                  Nick Wheeler
                                                  Participant
                                                    @nickwheeler
                                                    Posted by Bill Phinn on 21/06/2023 19:05:08:

                                                    Posted by Chris Pearson 1 on 21/06/2023 19:03:10:

                                                    I struggle to sympathize with those involved because I think that Titanic should be left alone – it is a grave.

                                                    I thought visiting graves was an acceptable everyday occurrence.

                                                    It is, when the person in it meant something to you.

                                                    But getting in the car, driving across the country, parking nearby, beating your way through bramble hedges and admiring the gravestone of Cedric Arthur Tollbutstone(born 1883, died 1912) by the light of a torch would be considered a bit odd…

                                                    #649305
                                                    Bill Phinn
                                                    Participant
                                                      @billphinn90025
                                                      Posted by Nick Wheeler on 21/06/2023 19:10:52:

                                                      Posted by Bill Phinn on 21/06/2023 19:05:08:

                                                      Posted by Chris Pearson 1 on 21/06/2023 19:03:10:

                                                      I struggle to sympathize with those involved because I think that Titanic should be left alone – it is a grave.

                                                      I thought visiting graves was an acceptable everyday occurrence.

                                                      It is, when the person in it meant something to you.

                                                      I don't think it's unreasonable to say that the people who died on Titanic mean something to a great many people.

                                                      The same can be said about the occupants of Commonwealth war graves, which people still visit in large numbers, sometimes travelling large distances to do so, and without necessarily having any close or even distant family member interred or memorialized in the cemetery they're visiting.

                                                      Even ordinary civilian cemeteries can have much larger visitor numbers than you might expect; taphophilia isn't all that odd, you see, statistically speaking at least. Whether you or others approve of it is another matter.

                                                      In Titanic's case, seeing the wreck in person is surely something countless people would want to do if they could do so reasonably safely and affordably. Having to beat their way to it through bramble bushes and rely on torchlight to see it at all would deter practically no-one if that was all that stood in the way of this particular goal.

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