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We, the unwilling, led by the unknowning, are doing the impossible for the ungrateful. We have done so much, for so long, with so little, we are now qualified to do anything with nothing. Semper Paratus!
In a sense it does. The opening fills up a wing like the new parachutes. This also keeps the sail from collapsing when they wind dies for a moment and conversely vents out gust through the big slit.
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Victor Raymond M/V Arktika 1984 Meta Arctic Voyager 47