Re:no other technique??? (Score 1)

What happens if you cruise at 20 knots and the wind never gets greater? What good those sails would do, even if the engine was a power assist there still would be the constant battle with the sails. If the wind gave way and the engine chugging away like normal the sails would then fill in opposite direction acting as parachute inciting the option to take to sails down or go slower as to let the sail fill again losing precious time in the busy time hungry world.