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Реферат Забезпечення навігаційної безпеки судноводіння





area of ??the Port, winds may gust to 35 - 40 knots. Months of high winds are December to March and July and August. Dry season is from November to May. The wet season is from May to November. This is in general for this area. At Puerto Bolivar, rain is infrequent.



JACKSONVILLE, Florida: 30 ° 20 N 081 ° 40 W: The port is located on the Atlantic Coast of Florida .: Varies from fresh water тисячу density to mixed salt water1007.5 density. St John s River is fed from fresh water sources and for most practical purposes may be considered fresh: For vessel with draft not more than 33 ft. no restriction sand vessel can enter and clear harbour on 24-hour basis. Pilots and tug assistance available all hours day or night. Vessels with draft more than 38 ft. required to await tide: Report: Approaches: The Jacksonville Sea Buoy lies outside the entrance of the St John s River on the edge of the Gulf Stream where a strong northerly current is usually experienced. The sea buoy (2STJ) is a red/white, lighted and whistle (Morse (A) buoy. A counter current setting to the south is usually found close along the coast just inshore of the sea buoy. Both the direction and velocity of currents and counter currents vary depending on past and prevailing weather conditions. Broken ground with least depths of 4 - 5 fathoms lies from 4 - 6 nautical miles from the coast for a considerable distance northward and southward of the St John s River entrance. Numerous fish havens are eastward of the entrance to St John s River; the outermost, marked by a private unlighted buoy, is about 27 nauticalmiles eastward of St John s Light.vessels should approach Jacksonville Sea Buoy from between SE and NE to avoid shallow water along the coast. There are many bright lights ashore at night which would cause confusion or mistaken identity with navigation lights. Refer to current NOS charts regarding danger and cautionary areas.traffic, especially southbound ships steaming inshore near the sea buoy to avoid the force of the Gulf Stream and take advantage of the counter current, may be encountered. Naval vessels may be encountered entering and departing Mayport and may also be encountered on exercises outside the sea buoy area.Channel: A federal project provides for a channel depth of 42 ft. from the ocean to St John s Point. A lighted whistle buoy is about 2 miles off the entrance to the river. The 800 ft. wide entrance channel between two converging rubblestone jetties is marked by lighted buoys. Two-way traffic is normal. The echo sounder should be monitored continuously for any silting that may occur and findings reported .: Vessels waiting outside the entrance to St John s River can anchor in depths of 36 - 50 ft. NNE of the jetties if wind and sea permit. Anchorage south of the jetty is not recommended because of heavy shrimp boat activity in that area. Pilots sometimes anchor vessels in the channel opposite Mayport Basin or at St John s Bluff in emergencies or while waiting for weather to clear upstream; however, these anchorages are not recommended due to strong currents. A tug should be stationed alongside to assist turning during change of tide.John s River Designated Permanent Anchorages: General (Upper): Located on the south shore off Commodore Point between Miller Creek and Empire Point. Vessels remaining in the anchorage more than 24 hours require a permit from the USCG Captain of the Port. (Lower) Anchorage: Located in the area off the Tallyrand Docks and Terminal. Use requires permit from the USCG Captain of the Port. The holding ground in both anchorages is only fair and both are somewhat constricted. It is not recommended that vessels with drafts over 34 ft. use these anchorages .: Vessels approach Pilot Entrance Buoy STJ No. 2 (red, racon buoy) 2.75 nautical miles at sea off jetty entrance to St John s River. Pilot station located within Jacksonville. Pilot station operates on VHF Channels 13 and 14, listening on Channel 16. Pilot cable address Jaxpilot. Pilot boards from one of two pilot boats, the St Johns and the Jacksonville, just east of Entrance Buoy STJ No. 2. Pilot boat does not maintain station at sea but answers call or is dispatched on information by vessels Agent. Vessels anchoring awaiting Pilot should anchor as near entrance buoy as safely possible .: Two anchorages located inside harbour near dock sites with depth of about 31 ft.





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