"Two hundred seventy yards!"
The sailors shouted as they hauled the measuring rope back out of the sea.
This was the stretch of sea where Castel had originally been. Several ships were anchored nearby, and the sailors aboard them tied stones to ropes and cast them overboard to measure the depth of the water beneath them.
Ken had proposed this method. The "Prince" had gone to Rhine to receive the Empress's investiture, leaving the investigation into Castel to the steward Ewan, who had come to these waters under Jeremiah and the others' guidance.
Two hundred seventy yards... That was a little over two hundred forty meters. Ken made a quick conversion in his head and wrote it down in his notebook.
Castel's units of measurement differed somewhat from those used outside. Theus seemed especially fond of units such as meters, kilograms, and liters, and all industrial matters used them uniformly.
Naturally, no one objected. Though this system of measurement was somewhat old-fashioned, it did not hinder their work.
But once they left the island, they often encountered situations where conversions were needed.
"How is it?"
Hearing the voice, Ken turned around to see Jeremiah striding over. Without waiting for an answer, he looked directly at the notebook in Ken's hands.
After studying for so long, Jeremiah had long since become literate and had even learned quite a bit of mechanical knowledge. Ken estimated that he was nearly ready to graduate from the advanced class.
The advanced class... He wondered where the people of Castel were now, and whether they were all right.
"Two hundred seventy... two hundred sixty-five... two hundred eighty-one... Is there a flat surface down there?"
"Yes!" Ken nodded. "The surrounding area is all deep sea. Only this place has a rocky protrusion, and its range is about