My broad conclusion is that an advanced global seafaring civilization existed during the Ice Age, that it mapped the earth as it looked then with stunning accuracy, and that it had solved the problem...
She found out that having something to do prevented you from feeling seasick, and that even a job like scrubbing a deck could be satisfying, if it was done in a seamanlike way. She was very taken with...
(a.) Following the business of a mariner; as, a seafaring man.