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Towage and Marine Operations

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    #16
    A great relief for everybody, but it was still left to secure the jacket with piles.
    The Barge HD 2007 alongside with the piles:


    First pile positioned for upending:


    Upending in progress:






    I only got to see the first pile set, as I was relieved at 1510 hrs. 30. March and left the HD 2500. That same day at 2210 hrs. I was admitted to hospital in Hong Kong.

    I long post, but I hope it is of interest to some here on CVF.

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      #17
      Just a quick post to say yes, it is of considerable interest –a riveting and satisfyingly detailed words and pictures account of the technical acomplishment and challenges involved in such an operation, and, it seems, intertwined with a very personal story. Greatly appreciated that you shared this.

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        #18
        Very interesting to watch the operation. Even though I've see photos of all sorts of mega operations I am still amazed when I see the people standing next to the lifting hook and piles. They look big but then when you see people next to them they become huge.

        Hearing you tell of weather windows. Missed that window, get back to a stable position and wait for another window. Is another side of the story that is not often said. I am accustomed to see such operations condensed to a one hour long TV show. It's interesting to hear more of the troubles and long delays waiting for the weather, though I'm sure you would call it something other than interesting when the jacket was dancing around trying to take the crane to the bottom.

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          #19
          In another thread there was a discussion about Grapplers and what they are for.
          Here is one being used to find and recover an anchor that had been missing on the seabed without anybody having recorded the exact position. All I knew was what the anchor had been used for.

          Using a Grappler tailing behind a boat and running lines diagonally across where logic told me the broken wire and chain was likely to be, we managed to get a grip on the chain and bring it on deck:


          The 7.5 m.t. Stevpris Anchor is on deck:


          Good as new after two years lost on the bottom:




          Two more missing anchors escaped "capture" and is still there, somewhere off Kelantan, Malaysia.
          Last edited by ombugge; October 25th, 2010, 12:12. Reason: replacing pics

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            #20
            Putting it to good use:




            Piggy backing:






            The Bridge during anchor handling:


            Not very practical lay-out of the Control Panels. The Ch. Engineer operating the winch is blocking the view for the Captain handling the boat. That is what you get when somebody with no practical experience gets to design the bridge.

            To make it worse they hired the smallest Indonesian Captain and the biggest Pinoy Chief they could find.
            Last edited by ombugge; October 25th, 2010, 12:10.

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              #21
              so i reken that the price of a new anchor is so much higher, than the costs for try to pick up a lost one from the seabed?
              best regards Thijs

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                #22
                Re: Towage and Marine Operations

                Originally posted by janihudi View Post
                so i reken that the price of a new anchor is so much higher, than the costs for try to pick up a lost one from the seabed?
                Yes Thijs, a 7.5 t. Stevpris is worth a lot more that it's scrap value.

                An anchor may not sound like a "high-tech" item, but a lot of experience and research has gone into the design of the Vryhof anchors.

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                  #23
                  Re: Towage and Marine Operations

                  you 're talking here about vrijhof anchors.
                  thus that mean that vrijhof is a brand/devolopper factory of anchers?
                  and not a supplier of anchors.
                  best regards Thijs

                  Comment


                    #24
                    Re: Towage and Marine Operations

                    Originally posted by janihudi View Post
                    you 're talking here about vrijhof anchors.
                    thus that mean that vrijhof is a brand/devolopper factory of anchers?
                    and not a supplier of anchors.
                    Vryhof is both developer, manufacturer and supplier of anchors, incl. special purpose anchors for the offshore oil and gas industry.
                    They also develop and manufacture anchor handling equipment. They are world leader in their field.

                    Here is a link to their web site and the "bible" of anchors, anchor handling and technology: http://www.vryhof.com/anchor_manual.pdf

                    Comment


                      #25
                      Re: Towage and Marine Operations

                      that is indeed a ''bible'' ,a lot of types of anchors and also how it al works.
                      never thought of ,that that little place was a world leader of that kind of anchors,but then again,i only know vrijhof Rotterdam.
                      best regards Thijs

                      Comment


                        #26
                        Re: Towage and Marine Operations

                        This thread has been neglected, by me and everybody else.
                        I take this opportunity to bring it back to life by showing a large barge with a jacket on deck leaving from Lumut, West Malaysia last week.

                        A familiar looking vessel coming into view behind the threes:


                        Aha, it is the POSH Persistence:


                        But she is moving slowly. What is she towing??
                        A semi-submersible cum launch barge. The POSH Mogami:


                        With a Steel Jacket on the launch beams:


                        The local tug Gerak Tegas is escorting at the stern:


                        I had nothing to do with this operation and don't know where they are heading.

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                          #27
                          Re: Towage and Marine Operations

                          AHTS Capricorn (ex Schelde, ex King Supplier, ex Arvid Viking, ex Northern Comrade) hooking up towline to a casualty in less than ideal weather.

                          Preparing the tow wire:


                          Anchor and chain from the casualty pulled on deck. Making connection:


                          Salvage crew returning from the casualty after the job on their side is done:

                          Not for the fainthearted to do a basket transfer in these conditions.

                          Tow progressing towards safe heaven:




                          PS> Capricon was one of the last UT 704 Mk. III to be built. Launched as Balder Schelde in 1985 by J. Patje, Holland.

                          PPS> Photos curtsy of the Master, AHTS Capricorn.
                          Last edited by ombugge; July 31st, 2013, 11:24. Reason: Add PS

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                            #28
                            For Marine Operations thread:
                            Anchor handling in good weather: http://www.youtube.com/watch?v=QXTFKQ-EFyQ

                            Comment


                              #29
                              Here is a typical example of Coonas* inginuity and a lesson on how NOT to do tandem towage: http://gcaptain.com/tandem-town-goes...Captain.com%29

                              Tandem = two vessels in line, one by one.

                              Comment


                                #30
                                NKK Report re: breaking of MOL Comfort is out: http://gcaptain.com/classnk-issues-p...Captain.com%29

                                Here is a video taken inside the longitudinal passage way of one of here sister ships: http://gcaptain.com/watch-containers...Captain.com%29

                                Large ships are designed to flex, but within limits.

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