Meteorology in strait of magellan

The western section of strait of magellan is windy all the year round, and the swell and wind direction are basically the same. The northwest wind prevailed in the eastern part of Taiwan Province Strait from mid-September to March of the following year, and it was stronger in June (65438+1October to June165438+1October), generally weakening with the sunset in the morning and afternoon. The wind in the west is always greater than that in the east, and the wind and waves at the entrance of the Pacific Ocean are generally greater than those at the entrance of the eastern Atlantic Ocean, often reaching 9 ~ 1 1. When passing through in winter, the wind force in the wide waters of the strait is sometimes as high as 7 ~ 8, and the swell is not very large under the shelter of the shore. If a ship calls at a Chilean port before or after passing through strait of magellan, the scope of compulsory water diversion is much larger than that of a ship passing through the strait only, and it is compulsory on the west coast.

The water diversion scope includes from (43° 40' s//074° 00' w) south to the whole strait of magellan sea area. When the pilot ship sails, some segments sail along the internal water route. Because the internal water route shuttles between the islands most of the time, it can avoid the heavy wind and waves in the South Pacific.

If the ship only crosses the ocean and passes through strait of magellan without stopping at the Chilean port, the compulsory pilotage area is from the water intake station at the Atlantic entrance of the Strait to the right of punta arenas Port (5310' s//070 54' w). The direct horizontal position from the Pacific entrance to punta arenas Port is the self-propelled leg, and the regulations for ships sailing in the east and west directions are the same. The voyage of the whole strait is about one day, in which the voluntary pilot section sails for about 10 hour. Once the scheduled ship decides to pass through strait of magellan, it is necessary to report the estimated arrival time of the ship and the scope of application for water diversion to the agent as soon as possible, so as to book water diversion in advance. If the ship only applies for compulsory pilotage diversion, it needs to make an appointment two days in advance; If applying for full water diversion, the eastbound vessel must submit the application 3-4 days in advance, because there is no pilot station at the Pacific entrance of the Straits, and the water diversion must take a pilot boat from punta arenas Water Diversion Station to the west entrance, with a voyage of 12 hours.

After the scheduled diversion, future generations will pay attention to the geographical location of the ship's diversion, and then the ship will update the ETA every day to ensure that the diversion will board the ship on time. Boarding place and water diversion method When a ship enters the strait from the west, if it applies for full water diversion, it will generally board the ship at (52° 55' s//074° 00' w). If the wind and waves are heavy, it is necessary to board the ship at (53 10' s//073 2 1' w) for water diversion. When the ship approaches the channel and reports to the signal station, the signal station will temporarily inform the pilot of the time and place of boarding. The ship must check the boarding position and make all preparations to safely approach the boarding point. If the ship sails eastward from the port of Chile and passes through strait of magellan, the diversion will generally board the ship near the west coast (43° 35' s//074° 00' w), and then reach strait of magellan along the coastal route without changing the diversion.

Entering the Strait from the east, if the weather is fine, the pilot will board the ship at the pilot station marked at sea as scheduled. If it arrives ahead of time, the shunt will use VHF/CH 16 to call the ship to slow down and approach the shunt station. If the wind and waves are heavy, it is necessary to board the ship at the entrance of the first narrow channel. If the ship only applies for compulsory water diversion, the water diversion will be picked up by the pilot boat. If it is the whole water transfer, the ship can also apply for helicopter transfer, but the ship must meet the conditions for helicopter transfer. If water is diverted to the ship at the entrance of the Pacific Ocean, the cost of the pilot ship is twice as high as that of the water diversion itself, while the cost of helicopter transshipment is only half that of the boat transshipment. Therefore, qualified ships can apply for helicopter diversion when applying for overall water transfer.

In addition, according to the pilot, large ships basically apply for full pilotage, and small boats mostly pilot themselves. Some self-propelled westbound ships are waiting to berth at punta arenas Port to pass through the third narrow waterway (PASO Tourtaud Cable) during the day.