Solar may be highly unlikely due to waves and salt salinization. See windmill ships for more on the second question > https://en.m.wikipedia.org/wiki/Windmill_

Solar may be highly unlikely due to waves and salt salinization. See windmill ships for more on the second question > https://en.m.wikipedia.org/wiki/Windmill_ship https://en.m.wikipedia.org/wiki/Windmill_ship