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IMAGE: The seas are alive with ships, from fishing vessels to container ships. This screenshot from marinetraffic.com gives a sense of just how many vessels are out on the high sea....
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Credit: Screenshot: Marinetraffic.com
Nearly everything in our daily lives -- from the electronic gizmos we all use, to the coffee we drink and the bananas we eat -- relies on shipping. Ships worldwide transport roughly 11 billion tons of goods annually, which works out to about 1.5 tons for every person on the planet.
But how do those ships navigate safely on the open ocean or in the crowded quarters of shipping lanes?