society > travel > travel by water > vessel, ship, or boat > vessel with reference to qualities or attributes > [noun] > qualities of vessel > seaworthiness or stability
1963 2 Mar. 8/4 Their employment in certain roles will depend largely on their sea-keeping qualities.
1972 C. Mudie 144 Maximum speeds have crept up from some forty knots to eighty knots in ten years and seakeeping has improved out of all recognition with rough water speeds nearly doubled.