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Daily Question for Jan. 7, 2018

The effect of free surface on initial stability depends upon __________.

A. the amount of liquid in the compartment

B. the dimensions of the liquid surface and the vessel's displacement

C. only the length of the compartment

D. the vertical position of the liquid in the vessel
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  1. UnknownJanuary 7, 2018 at 5:27 PM

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  2. UnknownJanuary 7, 2018 at 5:28 PM

    (B)

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  3. UnknownJanuary 7, 2018 at 6:53 PM

    A.

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  4. Friends of STABILITY AND TRIM FOR THE SHIP'S OFFICERJanuary 7, 2018 at 8:15 PM

    According to the USCG the best answer is B.

    FS correction = lb^3/12 (Displaced Volume)

    The dimensions of the liquid surface is accounted for by l and b above.
    "l' being the length of the liquid surface
    "b" being the width of the liquid surface

    The "Displaced Volume" is a function of Displacement.
    For metric units displacement in metric tonnes x 1.025 = Displaced Volume in cubic meters.
    For English units displacement in Long Tons x 35 cubic feet /LT = Displaced Volume in cubic feet.

    So, the dimensions of the liquid surface and the vessel's displacement all play a role in determining the Free Surface Correction.

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  5. UnknownJanuary 23, 2018 at 11:18 AM

    Bravo.

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