Boca Grande Channel, between Boca Grande Key and the Marquesas Keys, is about 15 miles W from Key West.
The channel has a controlling depth of about 11 feet from the Straits of Florida to the Gulf of Mexico and is marked by daybeacons, but is seldom used except by local boats of 6 feet or less draft. The channels through Key West Harbor are deeper and better marked, and offer a shorter passage from the Gulf to the Straits of Florida.
Currents:
In Boca Grande Channel the average velocity of the current is 1.2 knots; the flood current sets N and the ebb SSW. The velocity of the current is considerably influenced by the winds.
2012/04/9
Update
Cham
Boca Grande Channel,entre Boca Grande Key et les Marquesas Keys, se trouve à environ 15 M à l'W de Key West.
Le passage a une profondeur contrôlée d'environ 3,3 m à partir du détroit de Floride jusqu'au Golfe de Mexico et il est balisé avec des balises non lumineuses, mais est rarement utilisé en dehors des bateaux locaux de 1,8 m de TE ou moins.
Le passage à Key West Harbor est plus profond et mieux balisé. Il offre un court chenal du Golfe de Mexico au détroit de Floride.
Courants:
Dans Boca Grande Channel la vitesse moyenne du courent est de 1,2 n?uds; le flux vient du N et le reflux vient du SSW. La vitesse du courent est considérablement influencée par les vents.
The Marquesas Keys (not to be confused with the Marquesas Islands (French Polynesia in the Pacific Ocean) form an uninhabited island group about 30 miles (50 km) west of Key West, 4 miles (6 km) in diameter, and overgrown by mangrove. They are protected as part of the Key ...
Boca Chica Key is an island in the lower Florida Keys approximately 3 miles east of the island of Key West. Its name is Spanish for "small mouth", (not "girl mouth" as many assume, since chica used as an adjective in Spanish means small).It is mainly composed of salt marshes (mangroves) ...
Boca Grande Key is located in the Outlying Islands of the Florida Keys, it is the largest and westernmost of the Mule Keys that are 9 miles (15 km) west of Key West.Well protected and uninhabited Boca Grande is the first natural harbor after leaving Key West.
Mooney Harbor Key is located only about nine miles from Boca Grand. After carefully picking your way around the island you'll find a great outside anchorage on the west side of the island. This anchorage, with water depths of around 10 feet almost to the shore can be found at 24°33.826'N ...