On the surface of the sea, a fleet of warships was moving rapidly. With the advancements in maritime technology, navigators had reached a point where they could sail regardless of the seasonal winds, provided there was wind at all. While the wind blows from eight directions, sailing directly against it is impossible. However, sailing ships can "tack" into the wind, moving in a zigzag pattern to make progress against a headwind. Simply put, this technique involves adjusting the angle of the sails so the oncoming wind catches them at a slant, thereby generating forward momentum.
On the flagship in the center of the fleet, Shi Fu and Shi Lang were seated before a nautical chart, deliberating.
"Shi Lang," Shi Fu said, pointing to an area several hundred li south of Tamra Island, Joseon. "This is the most common route taken from Shanghai Port to Nagasaki Port in Japan."
Chapter 715