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  2. Navigation light - Wikipedia

    en.wikipedia.org/wiki/Navigation_light

    Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...

  3. Light characteristic - Wikipedia

    en.wikipedia.org/wiki/Light_characteristic

    While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart ...

  4. Navy lighterage pontoon - Wikipedia

    en.wikipedia.org/wiki/Navy_lighterage_pontoon

    The Navy Pontoon opened new avenues of attack. The 2'x 175' sections could be carried on sides of LST's and could land on shallow water beaches. They also were used to form an easy to assemble "in theater" dry dock. The sections LSTs transported hanging on their sides could be used to form the bottom and sides of a dry dock.

  5. Leading lights - Wikipedia

    en.wikipedia.org/wiki/Leading_lights

    Leading lights, also known as range lights in the United States, are a pair of light beacons used in navigation [2] to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation. The beacons consist ...

  6. 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 .

  7. Floating dock (jetty) - Wikipedia

    en.wikipedia.org/wiki/Floating_dock_(jetty)

    A Braby pontoon constructed at Evans Bay in Wellington, New Zealand in 1951 consisted of 124 large square steel tanks connected together and ballasted with water and oil. [9] The pontoon was U-shaped, 110 feet (34 m) long and 74 feet (23 m) wide. Flying boats were winched tail-first into the U so that passengers could step onto the pontoon dock ...

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