
1) Ability to stay afloat 2) Nautical terminology
Found on
https://www.crosswordclues.com/clue/seakeeping

Seakeeping ability is a measure of how well-suited a watercraft is to conditions when underway. A ship or boat which has good seakeeping ability is said to be very seaworthy and is able to operate effectively even in high sea states. ==Measure of seakeeping ability== In 1976, St. Denis suggested four principal terms needed to describe a seakeeping...
Found on
http://en.wikipedia.org/wiki/Seakeeping

General term describing the performance, controllability, and dynamic response of a vessel in a seaway.
Found on
http://www.encyclo.co.uk/local/20083
No exact match found.