Thanks Thanks:  613
Likes Likes:  1,299
Dislikes Dislikes:  37
Page 75 of 85 FirstFirst ... 25657374757677 ... LastLast
Results 1,851 to 1,875 of 2111
  1. #1851
    2/Lt
    Join Date
    Dec 2014
    Posts
    1,089
    Post Thanks / Like
    Quote Originally Posted by Graylion View Post
    you just calculated the volume of a block. For a ship you'll need the block coefficient, for simplicity's sake assume .5 so we are talking ~6.3 Gg displacement
    .

    Block Coefficient Cb is likely, I hope, closer to .75, especially if the stern is near full width and immersed at operational drafts. the tonnage may be approaching 9000 tonnes. I should have included Cb. The volume given was not of the block but of the amount of water displaced by the ship immersed to 5 meters.It's the volume of water adjusted by the SG of water in which it floats to give displacement.
    Last edited by ancientmariner; 10th January 2018 at 08:56.

  2. #1852
    Recruit
    Join Date
    Mar 2006
    Location
    Baltinglass
    Posts
    406
    Post Thanks / Like
    Endurance Class: 141 * 21 * 5m, 7.6 Gg. This gives a Cb of .513, So I'd say .5 is a decent approximation.

    https://en.wikipedia.org/wiki/Endura..._platform_dock
    Last edited by Graylion; 10th January 2018 at 13:48. Reason: source added

  3. #1853
    2/Lt
    Join Date
    Dec 2014
    Posts
    1,089
    Post Thanks / Like
    The vessels has a standard displacement of 6,500 tonnes at a lesser draft than that at loaded displacement which is stated to be 8,500 tonnes. Allowing for salt water I would put her Cb at .58.

  4. #1854
    Recruit
    Join Date
    Mar 2006
    Location
    Baltinglass
    Posts
    406
    Post Thanks / Like
    anyway. my point is that this is not a 12 Gg ship, but a 6.5 Gg ship ... Can we stop buying toys please? KTHXBAI

  5. #1855
    2/Lt
    Join Date
    Dec 2014
    Posts
    1,089
    Post Thanks / Like
    Quote Originally Posted by Graylion View Post
    anyway. my point is that this is not a 12 Gg ship, but a 6.5 Gg ship ... Can we stop buying toys please? KTHXBAI
    I concede your principal point. The ship in loaded terms would be close to 8000 tonnes. However the requests for expressions of interest will be around a ship 130 X 20 X 5 meters approx. If the ship has a chance of Home maintenance then it must be no bigger than 140 X 21 X 5.5 as the drydock locally is constrained in beam width of ship. A ship with uplift of 2000 tonnes, properly outfitted for role, and with topline defensive equipments should be more than a toy.

  6. #1856
    Recruit
    Join Date
    Mar 2006
    Location
    Baltinglass
    Posts
    406
    Post Thanks / Like
    Quote Originally Posted by ancientmariner View Post
    I concede your principal point. The ship in loaded terms would be close to 8000 tonnes. However the requests for expressions of interest will be around a ship 130 X 20 X 5 meters approx. If the ship has a chance of Home maintenance then it must be no bigger than 140 X 21 X 5.5 as the drydock locally is constrained in beam width of ship. A ship with uplift of 2000 tonnes, properly outfitted for role, and with topline defensive equipments should be more than a toy.
    There is always H&W

  7. #1857
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    Quote Originally Posted by Graylion View Post
    There is always H&W
    Not in the shipbuilding business any more. Just repairs and conversions.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  8. #1858
    Recruit
    Join Date
    Mar 2006
    Location
    Baltinglass
    Posts
    406
    Post Thanks / Like
    Quote Originally Posted by na grohmití View Post
    Not in the shipbuilding business any more. Just repairs and conversions.
    I thought we were talking about repairs just now? ie the ability to drydock NS vessels?

  9. #1859
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    Inconceivable sending a ship overseas to a foreign country for regular refits. Particularly when there is a functioning dockyard less than a km from the Naval base.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  10. Likes hptmurphy, restless, Turkey liked this post
  11. #1860
    Chief Casey Ryback
    Join Date
    Apr 2005
    Posts
    972
    Post Thanks / Like
    Quote Originally Posted by na grohmití View Post
    Inconceivable sending a ship overseas to a foreign country for regular refits. Particularly when there is a functioning dockyard less than a km from the Naval base.
    Well the ships are built abroad , so what's the difference .
    Don't spit in my Bouillabaisse .

  12. #1861
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    Quote Originally Posted by Laners View Post
    Well the ships are built abroad , so what's the difference .
    Where do you put the crew when the ship is gutted. This is a constant problem the NS never addressed, even in Haulbowline. One wonders if the fact the Flag is an ingineer he may come up with a workable solution.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  13. Likes DeV liked this post
  14. #1862
    Moderator DeV's Avatar
    Join Date
    May 2003
    Location
    East
    Posts
    20,604
    Post Thanks / Like
    Quote Originally Posted by na grohmití View Post
    Inconceivable sending a ship overseas to a foreign country for regular refits. Particularly when there is a functioning dockyard less than a km from the Naval base.
    Well if it was so big it didn’t fit in it’s drydock...

  15. #1863
    Commander in Chief hptmurphy's Avatar
    Join Date
    Jan 2003
    Posts
    13,422
    Post Thanks / Like
    Quote Originally Posted by DeV View Post
    Well if it was so big it didn’t fit in it’s drydock...
    then the country needs a new dry dock!
    Time for another break I think......

  16. Likes sofa, Graylion, Turkey liked this post
  17. #1864
    Chief Casey Ryback
    Join Date
    Apr 2005
    Posts
    972
    Post Thanks / Like
    Quote Originally Posted by na grohmití View Post
    Where do you put the crew when the ship is gutted. This is a constant problem the NS never addressed, even in Haulbowline. One wonders if the fact the Flag is an ingineer he may come up with a workable solution.
    Leave period and dry docking go hand in hand , a visit to a UK yard would be a day trip with a delivery / skeleton crew .
    Don't spit in my Bouillabaisse .

  18. #1865
    Moderator DeV's Avatar
    Join Date
    May 2003
    Location
    East
    Posts
    20,604
    Post Thanks / Like
    Quote Originally Posted by Laners View Post
    Leave period and dry docking go hand in hand , a visit to a UK yard would be a day trip with a delivery / skeleton crew .
    So no NS personnel undertake an maintenance or other activities during drydocking?

  19. #1866
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    That's the dockyards job. In many cases there is nothing to maintain anyway as the ship can be a bare metal shell.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  20. #1867
    Moderator DeV's Avatar
    Join Date
    May 2003
    Location
    East
    Posts
    20,604
    Post Thanks / Like
    Quote Originally Posted by na grohmití View Post
    That's the dockyards job. In many cases there is nothing to maintain anyway as the ship can be a bare metal shell.
    In 2009 the contractor was NS personnel (probably on other taskings). Have things changed?

  21. #1868
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    It depends on the work being done.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  22. #1869
    2/Lt
    Join Date
    Dec 2014
    Posts
    1,089
    Post Thanks / Like

    Drydock/ dockyard

    Quote Originally Posted by DeV View Post
    In 2009 the contractor was NS personnel (probably on other taskings). Have things changed?
    When a ship is to enter a Drydock, a Specification of work to be done is previously drawn up, and submitted to the contractor for bid cost. In our case while the Dock is unitary, there may be more than one contractor capable of doing the job. Drydocking is done on a time basis, for hull painting , but may also occur due to a ship/sea interface problem, such as a build up of growth slowing the ship or inlet/outlet malfunctions. While in drydock crew may be involved in maintenance work that does not create civilian/ union unrest.
    When a ship enters the naval dockyard for a maintenance period it can be carried out by Naval personnel only, or Dockyard and naval personnel working on separate systems, or Dockyard personnel only. In the last two cases work specifications are drawn up and costed as if for a civilian yard.
    Last edited by ancientmariner; 13th January 2018 at 13:06.

  23. #1870
    Moderator DeV's Avatar
    Join Date
    May 2003
    Location
    East
    Posts
    20,604
    Post Thanks / Like
    Typo on my part - during drydocking ship’s crew do undertake maintenance work to supplement the civvy contractor (I assume different tasks (eg there isn’t a NS/civvy mix of people working on the hulk)) at least that was the case in 2009

  24. #1871
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    Quote Originally Posted by DeV View Post
    Typo on my part - during drydocking ship’s crew do undertake maintenance work to supplement the civvy contractor (I assume different tasks (eg there isn’t a NS/civvy mix of people working on the hulk)) at least that was the case in 2009
    As I said, it depends what work is being done. Naval crews are skilled workers, but there are some jobs that are best left to contractors. Not all occasions the ship is in drydock are for pure "drydocking". Mid life refits are also done here. I think it was 2007 when every inch of paint was removed from Eithne's upper decks by abrasion blasting. This involved erecting a scaffolding "tent" around the areas being worked on to prevent harmful dust getting into the armosphere. This is a very hazardous task that must be carried out by people who do it regularly. On the same occasion the ship was completely rewired, and the ECDIS upgraded. Yes the Naval crew could do it, but it would be more efficient to get a crew of civvy contractors in.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  25. Thanks DeV thanked for this post
  26. #1872
    CQMS Tempest's Avatar
    Join Date
    Feb 2009
    Location
    Surrey, UK
    Posts
    249
    Post Thanks / Like
    https://m.facebook.com/story.php?sto...00001411435392

    I hope the new EPV will cope with these conditions?!?

  27. #1873
    CQMS
    Join Date
    Apr 2017
    Posts
    123
    Post Thanks / Like
    Quote Originally Posted by Tempest View Post
    https://m.facebook.com/story.php?sto...00001411435392

    I hope the new EPV will cope with these conditions?!?
    This footage is actually of the MV Suilvan then operated by Strait Ferries in New Zealand between 1995-2004 leaving Wellington harbour for Picton on February 6 2002. It sunk off Suva Harbour Fiji in 2015.

    The EPV will no doubt be substantially larger. The Suilvan built in 1974 had just 250 lane metres was only 3636 GT and 86m.

  28. Thanks Tempest, sofa thanked for this post
  29. #1874
    Major General
    Join Date
    May 2014
    Posts
    3,825
    Post Thanks / Like
    Did that used to work the Scottish Isles for Calmac? Quite small for a ferry. About the same dimensions as an OPV. Close coastal waters in shallows like that are not a good environment for ships like that in a storm.
    German 1: Private Schnutz, I have bad news for you.
    German 2: Private? I am a general!
    German 1: That is the bad news.

  30. #1875
    Recruit
    Join Date
    Apr 2005
    Posts
    86
    Post Thanks / Like

  31. Likes na grohmití liked this post

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Naval air ops no more?
    By Goldie fish in forum Navy & Naval Reserve
    Replies: 303
    Last Post: 29th December 2015, 13:01
  2. Naval Wishlist(realistic)
    By Goldie fish in forum Navy & Naval Reserve
    Replies: 58
    Last Post: 10th April 2007, 22:54
  3. Naval Training Ship?
    By Goldie fish in forum Navy & Naval Reserve
    Replies: 5
    Last Post: 4th February 2003, 00:19

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •