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Daily Question for Feb. 22, 2018

Before counterflooding to correct a list, you must be sure the list is due to __________.

A. negative GM

B. flooding

C. off-center weight

D. reserve buoyancy

Comments

  1. Yuri PantojaFebruary 22, 2018 at 1:53 PM

    LETTER D, reserve buoyancy.

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  2. UnknownFebruary 22, 2018 at 2:43 PM

    C. off-center weight rather than flooding. You don't want to sink quicker

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  3. UnknownFebruary 22, 2018 at 3:18 PM

    C

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  4. Friends of STABILITY AND TRIM FOR THE SHIP'S OFFICERFebruary 22, 2018 at 3:22 PM

    Sorry Yuri, the best answer is Choice C.

    A. is a bad choice. You never counterflood if you have an angle of loll caused by a negative GM. In fact the proper procedure is to take ballast on the low side to reduce KG and hopefully turn a negative GM into a positive GM with an off-center weight.

    B. flooding? this makes no sense at all!!!!!!!!!!!!! We are not talking damage stability here just how to correct a list. So there is no assumed damage or flooding in this question.

    D. reserve buoyancy? Again we are not dealing with a damaged condition. This is a better detractor than choice B. But it still makes no sense with this question.

    So C. is the best answer.

    Simply stated if you are in a row boat with a friend and you have a list, just scoot a little to the high side of the thwart to reduce the list. Do not stand up, you might make your row boat's positive GM negative. If your friend shifts their weight in this case while you are standing the boat might capsize!

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  5. sharp21February 22, 2018 at 3:50 PM

    With a negative GM you’ve got to make it worse before you can make it better

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  6. Friends of STABILITY AND TRIM FOR THE SHIP'S OFFICERFebruary 22, 2018 at 8:12 PM

    There is a good diagram on page 106 of STABILITY AND TRIM FOR THE SHIP'S OFFICER, 4th Ed., Fig. 5-14, Illustrating the right and wrong way to correct a Negative GM. Also pages 104 and 105 discuss Effect of Negative GM on Vessels. From these pages you can see the basis of today's question.

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  7. UnknownFebruary 24, 2018 at 4:50 AM

    Charley,

    Better yet, evenly distribute your load would be the best.
    Though not an answer. :-)

    ReplyDelete

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