ship speed exceed 50knots

Discussion in 'Class Societies' started by Brian.Lin, Oct 8, 2010.

  1. Brian.Lin
    Joined: Aug 2006
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    Brian.Lin Junior Member

    Sir,

    we have a new project. its speed is 55knots.
    LOA is 12 meters.

    does any rule can supply this boat?
     
  2. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Either it is a project "given" to you or it is a project that "you have started", thus:-

    1) Given to you,
    Then you need to ask the designer for the specification. All the information you need shall be in there
    or
    2) Your own,
    You need to write a specification based around the SOR of your client.

    If you have neither #1 or #2...no one can help you. Because no one shall know what the boat is designed for and what rules/regulations it is to comply with!
     
  3. Brian.Lin
    Joined: Aug 2006
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    Brian.Lin Junior Member

    thanks

    The tender write as follows.
    [The tenderer shall state the Classification Society and type of vessel that the proposed Vessel will be designed and built to.
    The following international Classification Societies are acceptable
    to Owner: ABS, BV, CCS, DNV, GL, KR, LR, NK, RINA]

    I want to calculate the scantling of structure.
    I check the ISO 12215-5 and ABS HSC rule.
    They can't supply the craft with a maximum speed >50 knots.
     
  4. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Brian,

    The classification is just one apsect...you need to know what duty the boat must perform and where.

    There is a big differnce between a run-about 50knot boat on a calm lake for pleasure, compared to a heavy duty patrol boat doing 50knots running in heavy seas......so the duty, what the deisgn must do and where, that shall dictate.

    But i would advise going with DNV.

    BTW
    I did a 45knot 14m interceptor boat to DNV, no problem.
     
  5. Brian.Lin
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    Brian.Lin Junior Member

    thanks
     
  6. Olav
    Joined: Dec 2003
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    Olav naval architect

    Both ABS and DNV/RINA/GL HSC Code don't have an upper speed limit, so I don't see any problems with them.
     
  7. gonzo
    Joined: Aug 2002
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    gonzo Senior Member

    You need to calculate slamming loads, etc, according to whatever rule you choose. However, you do have to choose before you design. Otherwise it won't make any sense. Each rule has different requirements. For example, in the USA if it is not for carrying passengers for hire, you only need to comply with USCG safety regulations. In Europe you have CE standards. In the UK you decide what category the vessel is. You can use a standard method or your own. In Spain you need a Spanish NA to certify it. The information you provide is not enough to give you an answer you can use.
     

  8. dskira

    dskira Previous Member

    Reading your question, I am not sure you can design it.
    But I can be wrong.
    Good luck
     
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