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  2. Buoy - Wikipedia

    en.wikipedia.org/wiki/Buoy

    Ice marking buoys mark holes in frozen lakes and rivers so snowmobiles do not drive over the holes. Large Navigational Buoys (LNB, or Lanby buoys) are automatic buoys over 10 meters high equipped with a powerful light monitored electronically as a replacement for a lightvessel. [11] They may be marked on charts as a "Superbuoy." [12] Lateral ...

  3. Sea mark - Wikipedia

    en.wikipedia.org/wiki/Sea_mark

    In any case, since in many harbours it is not always apparent which direction is seaward, buoys should be used in connection with the appropriate nautical chart. Additionally, since marks may be off station due to collision with ships, storms or other factors, they should be used with caution and not relied on solely for navigation. The two ...

  4. GPS sonobuoy - Wikipedia

    en.wikipedia.org/wiki/GPS_sonobuoy

    Buoys are manufactured by the French company ACSA-underwater-GPS (subsidiary of the ALCEN group). Three off-the shelf products are available from the small portable GIB-Lite system to the large torpedo tracking GIB-FT, and including the medium-size, medium-range GIB-Plus system.

  5. Navigational aid - Wikipedia

    en.wikipedia.org/wiki/Navigational_aid

    A navigational aid (NAVAID), also known as aid to navigation (ATON), is any sort of signal, markers or guidance equipment which aids the traveler in navigation, usually nautical or aviation travel. Common types of such aids include lighthouses , buoys , fog signals , and day beacons .

  6. Safe water mark - Wikipedia

    en.wikipedia.org/wiki/Safe_water_mark

    They are also known as fairway buoys and clear water buoys. They are recognisable by their red-and-white vertical stripes and commonly bear a top sign in shape of a red ball. They either flash Morse code "A" (di-dah), or one long flash, occulting (more light than dark) or isophase (equal light and dark) every 10 seconds (L Fl 10s).

  7. Estonia says Russia removed navigation buoys on border river

    www.aol.com/news/estonia-says-russia-removed...

    Russian border guards have removed navigation buoys from the Estonian side of a river separating the two countries, the Baltic nation said on Thursday, adding that it would seek an explanation as ...