ISO 11812 - Drains dimensions assessment

Discussion in 'Class Societies' started by Francesco Rossi, Feb 22, 2016.

  1. Francesco Rossi
    Joined: Sep 2009
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    Francesco Rossi Junior Member

    Hi guys,
    I'm doing the assessment following the ISO 11812.
    My boat is a 23meters, looking like a supply vessel:
    - Main deck of about 10 meters in the aft part no superstructure no openings and a 70cm bulkward
    - Upper deck with superstructure and 80cm bulkward

    How should I consider the flow of the water overboard?
    Separately on the two level?
    I couldn't find anything on the rules about my issue...maybe someone had already encountered that problem...

  2. meren
    Joined: Sep 2005
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    meren Junior Member

    Real issue lies in the stability standard ISO12217-1:2013 in chapter "recess size". Draining time in ISO 11812 is next to nothing with recess size requirements including water on deck affecting stability calculations.
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