Merchant Marine Stability and Trim License Questions

Your vessel rolls slowly and sluggishly. This indicates that the vessel __________. A. has off-center weights B. is taking on water C. has a greater draft forward than aft D. has poor stability

Please keep in mind this applies to small angles of transverse inclination say no more than 5 to 8 degrees. As B moved transversely it travels in the path of an arc for a wall sided vessel. The center of the arc is located at M where B is acting upward through M, the Metacenter. The radius of this arc is BM, the Metacentric Radius. My favorite illustration is Fig. 16-2, on page 46, of the 4th Edition of "Stability and Trim for the Ship's Officer".

What is the definition of transverse metacenter? A. The distance between the actual center of gravity and the maximum center of gravity that will still allow a positive stability. B. The point to which G may rise and still permit the vessel to possess positive stability. C. The sum of the center of buoyancy and the center of gravity. D. The transverse shift of the center of buoyancy as a vessel rolls.

If the metacentric height is small, a vessel will __________. A. be tender B. have a quick and rapid motion C. be stiff D. yaw

Your vessel's draft is 24'-06" forward and aft. The MT1 of your vessel is 1000 ft-tons. How many tons of cargo must be loaded in number 4 hold, which is 100 feet abaft the tipping center, if she is to have a 2 foot drag? (Note: drag = trim by stern), (tipping center = LCF) A. 120 tons B. 240 tons C. 300 tons D. 480 tons

A vessel's KG is determined by __________. A. dividing the total longitudinal moment summation by displacement B.  dividing the total vertical moment summation by displacement C. multiplying the MT1 by the longitudinal moments D. subtracting LCF from LCB

Which will be a result of removing on-deck containers? A. KG will increase B. Metacentric height will increase C. KB will increase D. Reserve buoyancy will decrease