Caribbean Sea. British Virgin Island.

The cays and islets lying up to 2 miles SSW of Virgin Gorda as far as Round Rock are composed of granite stone. Fallen Jerusalem, the largest of these islets, resembles a town in ruins. Uncharted below-water rocks were reported to exist between Round Rock and Fallen Jerusalem. Three submarine cables, best seen on the chart, exist between Virgin Gorda, Great Camanoe, Little Camanoe, and Tortola.
  A group of sparsely wooded islands, cays, and reefs front the N side of Virgin Gorda at a distance of 2 miles. Virgin Sound, Gorda Sound and Eustatia Sound lie within these islands and dangers.
With a population of about 2,500 is a favorite stop-over for both yachtsmen and landlubbers. It is linked to the other islands by a small airport and regular ferry services. The northern half of the island is mountainous with a good-sized peak of 1,370 feet, while the southern half is flat and scattered with giant boulders. The B.V.I.'s most famous natural attraction, The Baths - giant boulders forming a series of spectacular pools and grottoes - is located here. There are some 20 beaches on Virgin Gorda, including the beautiful Devil's Bay (a national Park), Spring Bay and Trunk Bay. There is also the abandoned Copper Mine on the southeast tip of the island where a boiler stack and other 19th century stone buildings can still be observed.
Necker Island (18°32'N., 64°22'W.) is the northernmost island off the coast of Virgin Gorda. Foul ground with depths of less than 5.5m, extends about 0.5 mile W and about 0.3 mile SE. A continuous bank of coral heads has grown between 0.1 and 0.2 mile off the SW coast.
The Invisibles, lying about 0.7 mile E of Necker Island, are three rocky heads over which there are depths of from 1.2 to 1.5m, and the sea breaks over at times.
  These rocks are not easily seen and caution should be used when in their vicinity.
Mosquito Island (18°31'N., 64°24'W.) lies about 2 miles SW of Necker Island and is separated from Virgin Gorda by a narrow and shoal passage.
  Colquhuon Reef, which dries in some spots, extends about 0.5 mile SE of Mosquito Rock, which lies off the NE side of Mosquito Island.
Prickly Pear Island (18°30'N., 64°22'W.) lies about 1 mile E of Mosquito Island. It is the largest of the islands off the N side of Virgin Gorda.
  Eustatia Island, close E of Prickly Pear Island, is enclosed by foul ground.
  Virgin Sound, a channel 0.2 mile wide, extends between the reefs and shoals N of Prickly Pear Island and Eustatia Island and those S of Necker Island. The sound affords good temporary anchorage, in depths from 12.8 to 18.3m, but care should be taken to avoid foul ground on either side.
  Eustatia Sound is an area contained within the foul ground W of Eustatia Island, offering safe anchorage to small craft. Necker Island Passage, lies between Necker Island and Herman Reef and Robert Reef.
  This passage should only be used during daylight hours. Less water than charted has been reported 3 miles E of Pajaros Point.
Gorda Sound (18°30'N., 64°22'W.) lies between Mosquito Island, Colquhoun Reef, Prickly Pear Island, and the N coast of Virgin Gorda. The sound is protected from all winds and sea rollers. Ships visiting Gorda Sound should obtain pratique at Road Harbour prior to entry.
  Depths—Limitations.—General depths of 16.5 to 21.9m lie in the approach to the entrance, which lies between Colquhoun and Cactus Reefs. A channel with depths of 5.8 to 10.6m leads through the entrance, which is marked by buoys.
   Within the entrance, the depths gradually increase to 18.3 to 21.9m in the large basin SW of Prickly Pear Island. Gorda Rock, about 0.5 mile SSW of the N end of Prickly Pear Island, has a depth of 9.1m and is the only danger in the fairway.
   The channel between Gorda Sound and Eustatia Sound is shallow and foul, and in the middle of it is Saba Rock, 4.6m high. The W part of Gorda Sound between Mosquito Island and Anguilla Point is foul.
  Anchorage.—Good sheltered anchorage can be taken in the middle part of the sound, in depths of 20.1 to 21.9m.