the.com/sailboat

the only vehicle that turns an invisible enemy into forward motion

means A boat propelled by the wind acting on one or more sails, rather than by an engine or oars.

from A plain English compound of "sail" plus "boat." "Sail" descends from Old English "segl," a word shared across the Germanic seafaring tongues (compare Dutch "zeil" and German "Segel"), and "boat" from Old English "bāt." The two have been lashed together since speakers needed to distinguish a wind-driven hull from one driven by other means — a distinction that only really mattered once steam and engines gave boats a rival to the breeze.

upwind trick
sails like a wing, not a parachute
oldest tech
powered humans before the wheel reached water
faster than wind
some hulls outrun the breeze pushing them
silent engine
crosses oceans burning zero fuel
keel ballast
tons of lead keep it from flipping
for instance

america's cup — oldest international sporting trophy, first won by the yacht america in 1851

volvo ocean race — 9-month round-the-world sailing race, now called the ocean race, started 1973

bermuda race — 635-mile offshore race from newport to bermuda, first held in 1906

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