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In order to be located and rescued in a short time you have to http://url.org/bookmarks/antoinettehunter provide their own geographical coordinates, latitude (position relative to the equator) and longitude (position relative to the Greenwich meridian): if you can not provide those of the point where you are at the time of emergency.
You should at least communicate the references of the last point the ship and the estimated course, that should be noted at every hour on the logbook. In ships (the term ship is expected when the length of http://georgealexander.page4.me/index.html the hull is above 24 meters) there is a radio communications officer, in boats recharge api at least one member of the crew, the captain.
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Which operates in the HF (High Frequency) and that requires very long antennae and a special adapter, called tuner that allows you to engage in a particular frequency transmission. This particular http://clarencepeterson.simplesite.com/413328754 transmission technique allows, in addition to radio communications, the sending and receiving of weather maps, faxes, and e-mail.
Obviously for this last purpose, the radio devices must be appropriately interfaced with a personal computer. The last frontier of communications at sea is represented by http://stephanieclark.webstarts.com/index.html?r=20141118164001 satellite systems which, in addition to those search and emergency, are also intended to communications recharge api between users.
These systems, after a series of http://www.dipity.com/garywilkerson/recharge-api/ experiments started in 1960, were finally developed in 1979 and took off with their practical use in 1991 with the system (International Maritime Satellite Organization), the body recharge api responsible for managing communications in sea.
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