@George,
Yes, they are . . . and i just came to post about
Flying Cloud.
The captain of
Flying Cloud was Josiah Creesy, and the navigator and sailing master was his wife, Eleanor Creesy. Eleanor was a native of Nantucket, and as her father had had no sons, he taught her navigation. In 1853, they broke their own record, making the passage in 88 days, 20 hours. That record stood for 136 years until a racing yacht,
Thursday Child, with a radical new, computer-assisted design, beat their time by eight days. A French yacht made the passage in under 44 days in 2008.
One day of the 1851 passage, Eleanor was able to confirm that on one day,
Flying Cloud had logged an average of over 14 and a half knots for a noon-to-noon sighting. Almost nothing at sea could match that speed, and certainly not in the difficult passage around South America.