Cape Bolton NK to Mount Chōkai Jp

Obviously, those mountains which we saw so clearly on the solar disk had to be on a line between us and the rising sun...The distance from the cruiser to that mountain was 480 sea miles.

"Obviously, those mountains which we saw so clearly on the solar disk had to be on a line between us and the rising sun. And, indeed, by constructing on a chart the aforementioned azimuth of the sun at the moment of its rising, it turned out that this line passed just through the high mountain Tonvumi-yama , located on the north-western part of the Japanese island of Nippon [sic -- he means Honshu], at north latitude 39° 5' and east longitude 140° 10', not far from the city of Akita. The distance from the cruiser to that mountain was 480 sea miles." An accurate calculation gives 897 km or 490 nautical miles."