Tickets+.....disagree....the sails are surely functional....they use them when they can, usually the first hour or two after sailaway, and, about two hours before port arrival, and, also depending upon the nautical miles they must travel.
On our Bahamas cruise, the Wind Surf did about 1/3 the cruise under sails only, primarily because of the short distances between ports.
The Captain acknowledged that they use motor power, with sails for show, if necessary.
