Freeboard calculation according to ICLL

Discussion in 'Boat Design' started by e.m.milad, Jan 31, 2017.

  1. e.m.milad
    Joined: Jun 2015
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    Location: Gulf

    e.m.milad Junior Member

    Hi every body
    I am trying to calculate freeboard of a vessel
    in my calculation I found (freshwater allowance) less than (summer freeboard - tropical freeboard)
    is it possible?:confused::confused::confused:
    I mean this means ship allows to sink more in tropical zone more than in fresh water!!!
    is it possible?
    where is my problem??
    is the model and TPC or displacement is wrong?
    Thank in advance for your answer
     
  2. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    I think you need to supply more information that that. As there is insufficient information to say what/where/why....
     
  3. e.m.milad
    Joined: Jun 2015
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    Location: Gulf

    e.m.milad Junior Member

    Well I think because water density of oceans is about 1.020 to 1.029 then the maximum tropical draft of one specific ship (regardless of ship type) shall always be less than maximum freshwater draft.
    I want to know if (by some reasons I do not know why) in freeboard calculation we reach opposite results what should we do?
     

  4. Heimfried
    Joined: Apr 2015
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    Location: Berlin, Germany

    Heimfried Senior Member

    The greater the freeboard the lesser the draft. Did you mix it up?

    E. g.: The deckline shall be z(deck) above the keelline (z(keel) = 0) . The tropical fresh water draft is z(TF). Then the freeboard TF is z(deck) - z(TF).

    The winter north atlantic draft z(WNA) is lesser then z(TF), therefore the freeboard WNA is greater: freeboard WNA = z(deck) - z(WNA).
     
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