Regulatory definition of ship breadth

Discussion in 'Boat Design' started by e.m.milad, Dec 5, 2016.

  1. e.m.milad
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    e.m.milad Junior Member

    hi every body!
    I had an odd case with ship terms and definitions I want to know regulatory definition of ship breadth in ships with flare or Some Thing like that as picture below :
    which one is the breadth of the ship according to ICLL 69 or SOLAS

    [​IMG]
     
  2. TANSL
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    TANSL Senior Member

    The best thing you can do is read the rules you want to apply. I know it is not a pleasant task, but to apply a regulation it is important (essential) to know it.
    All the regulations, in the first pages, explain how to measure the dimensions of the artifact to be calculated.
     
  3. e.m.milad
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    e.m.milad Junior Member

    Hi TANSL !
    Thank you for your kind response
    I read those regulations many times! but this is a controversial question !
     
  4. Ad Hoc
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    Ad Hoc Naval Architect

    SOLAS is very clear:

    "...Breadth of the ship is the extreme width from outside of frame to
    outside of frame at or below the deepest subdivision load line..."

    Part A reg.2
     
  5. e.m.milad
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    e.m.milad Junior Member

    So which one is the breadth?
    The B at deck? according to flare ( or rectangular thing!) ?
    or
    the B at side neglecting the flare?
     
  6. Ad Hoc
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    Ad Hoc Naval Architect


    :rolleyes:
     
  7. RAraujo
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    RAraujo Senior Member - Naval Architect

    On the other hand according to ITC69 (you are referring to ICLL 69 which I do not know - it is ITC69 or ICLL66):

    Breadth - The breadth is the maximum breadth of the ship, measured amidships to the
    moulded line of the frame in a ship with a metal shell and to the outer surface of
    the hull in a ship with a shell of any other material.

    and according to ICLL66:

    Breadth. Unless expressly provided otherwise, the breadth (B) is the maximum
    breadth of the ship, measured amidships to the moulded line of the frame in a ship
    with a metal shell and to the outer surface of the hull in a ship with a shell of any
    other material.

    As Tansl mentioned the definition should be in the corresponding instrument as different instruments might have different definitions.
     
  8. e.m.milad
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    e.m.milad Junior Member

    Thank you very much Sir
    I meant International Convention on LoadLines 1966
    according to the definition the largest one is the breadth??
     

  9. RAraujo
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    RAraujo Senior Member - Naval Architect

    Yes, it should be the maximum breadth measured at a section midway between the perpendiculars (according to the Length definition of the ICLL66). Note the differences in measurement for different materials...
     
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