Southwest Channel leads between the reefs W and SW of Garden Key and those off Loggerhead Key. The least depth found along the marked channel is 31 feet, but the same caution is advised as with Southeast Channel.
Among the reefs and keys are numerous places where vessels can anchor and find shelter from seas from various quarters.
In Southwest Channel, the current floods N and ebbs SW at an average velocity at strength of 0.5 knot.
Le chenal SW s'étend entre les récifs W et SW de Garden Key et ceux de Loggerhead Key. La profondeur du passage balisé est 9,3 m mais il faut être prudent comme pour le chenal SE.
Entre les récifs et les keys il y a de nombreux endroits où les plaisanciers peuvent mouiller et trouver de bons abris. Les flux du courent N et les reflux SW ont une vitesse moyenne de 0,5 n?uds.
Southeast Channel skirts the reefs S of East Key and Middle Key, and passes between the 25-foot shoal S of Hospital Key and Iowa Rock off Bush Key Shoal. Iowa Rock is marked by a light. The reefs S of Middle Key can be cleared by keeping S of a line through the abandoned lighthouse ...
For 10 miles W from the Dry Tortugas the bottom is broken and irregular, and consists of coral rock with patches of sand and broken shell. Tortugas Bank, the shoalest part of this area, is 7 miles W of Loggerhead Key and has a least known depth of 37 feet. Depths less than 10 fathoms ...
Loggerhead Key, the other of the two principal keys in the Dry Tortugas, is 2.5 miles W of Garden Key. It have a conical tower, lower half white and upper half black, near the center of Loggerhead Key.
The Dry Tortugas lighthouse, along with the Garden Key lighthouse at Fort Jefferson, were the only lights on the Gulf coast that stayed in full operation throughout the American Civil War. The tower (151 feet above the water) was damaged by a hurricane in October 1873 and plans ...
Bird Key Harbor, reached through the narrow channel encircling Garden Key, wich is well marked, is an excellent anchorage. The entrance to Bird Key Harbor is narrow, and care is required to avoid the shoals on either side. The main entrance channel is marked by daybeacons.
Garden Key is the site of historic Fort Jefferson National Monument, a hexagonal structure with walls 425 feet long rising from a surrounding moat. In 1846, the US Army began to construct a massive fortification on the tiny island known as Garden Key. Sixteen million bricks were ...