Global V line and Local V line

Discussion in 'Stability' started by marufuddin0, Sep 2, 2020.

  1. marufuddin0
    Joined: Feb 2016
    Posts: 23
    Likes: 2, Points: 3, Legacy Rep: 10
    Location: Bangladesh

    marufuddin0 Naval Architect

    Hi, What is the Global V line and Local V line? I need to submit this drawing/calculation for a passenger-vessel along with probabilistic damage stability. I looked into the BV rules, however, I am not sure how to represent these in the booklet.

    I found in the rule book that
    • "Watertight V-lines" derived from equilibrium heel angle limit (final or intermediate stages of flooding)
    • "Weathertight V-lines" derived from positive range limit (of GZ-curve)
    upload_2020-9-2_12-7-21.png


    Please help.
     
  2. Yobarnacle
    Joined: Nov 2011
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    Location: Mexico, Florida

    Yobarnacle Senior Member holding true course

    Is it possible, Global V line and Local V line, refer to a difference in International and local national regulated methods of calculation or equations used.?
     
  3. marufuddin0
    Joined: Feb 2016
    Posts: 23
    Likes: 2, Points: 3, Legacy Rep: 10
    Location: Bangladesh

    marufuddin0 Naval Architect

    Dear,
    I don't think so. The attached figure says it is related to watertight and weathertight openings. BV stability software shows an explanation like the following but I am still confused.

    upload_2020-9-3_10-14-44.png
     
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