| 摘要 |
PROBLEM TO BE SOLVED: To install ART on a ship on which it is difficult to install a usual ART managing expanded range of righting moment of the ship due to excessive quantity of used liquid, a free surface secondary moment of a tank or the like and combination regulation of righting moment. SOLUTION: A primary tank for varying ART resonance frequency having a liquid passage height of a same dimension and sharing side partition wall partitioning front and rear, and a secondary tank capable of adjusting the free surface secondary moment of the tank to corresponding to GM value are integrated to form a U-shaped pipe type rolling reducing water tank as a main body. Combination of the primary tank and the secondary tank, selection of tanks A, B, C, variation of ART resonance frequency and liquid braking and the like are automatically operated to cope with wide range of GM value and lateral rolling frequency.
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