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Lighthouses are used as an aid to navigation in coastal waters.
lighthouse, pharos, beacon, shipping, navigation, reflector, sea, sea shore, reef, coast, technology
Ports must provide necessary infrastructure and services for industry and marine transportation.
Commercial maritime routes of container ships form a global network.
This animation demonstrates the design and operation of a traditional cinema projector.
Oil tankers appeared in the late 19th century; today they are among the largest ships.
A wide variety of optical instruments are in use today, ranging from microscopes to telescopes.
The largest ocean liner at the time of its construction.
The Global Positioning System consists of 24 satellites but only 4 have to be visible for positioning.
RMS Titanic was the largest passenger ship at the beginning of the 20th century.