Translation of "tender ship" into Russian

The opposite of a stiff ship is called a tender ship, which has a very small metacentric height and, as a result, a very small righting moment. A tender ship has a very long roll period, which means that the vessel will return to upright very slowly and has insufficient stability. A “tender ship” will resist rolling less, will roll more steeply, and will tend to remain heeled over for a longer period. Neither a stiff nor a tender ship is desirable, but you want to be in a happy middle ground.