dames point lightとは 意味・読み方・使い方

The Dames Point Light marked an 8-foot-deep (2.4 m) shoal at a sharp bend in the St. Johns River in Florida that was a danger to ships heading to or from Jacksonville. In 1857 a small lightship was placed at the Dames Point shoal. The lightship was also equipped with a foghorn and bell. During the Civil War, the lightship was towed to Jacksonville, and all equipment was stored on shore. The ship did not survive the war, and the shoal remained unmarked until 1872.