"Hey? Divine Buddha, the sea wind has changed again! From blowing towards 'A' position, it's now blowing towards 'E' position..."
"What, blowing towards E position? Doesn't that mean it's blowing directly east? If the ship sails east, then this time, it'll be a complete tailwind, and we can cover 300 li in a day!..."
"No, that's not right! Kim Sun-su, the wind is blowing east, but the coastline turns southeast, so the ship's bow must also veer south... So, we're still between a crosswind and a tailwind, leaning towards tailwind... I estimate we can cover around 230 to 240 li in a day, a bit faster..."
"Great! Park Sun-pan, go and inform Lord Priest Mi, it's still good news... Hmm? Wait! Look ahead! Is that a big rivermouth?"
"Hey? It truly is a big rivermouth! No, wait! The rivermouth is murky, the seaport is clear... this azure with a hint of green appearance should be a seaport!..."
