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  2. Port and starboard - Wikipedia

    en.wikipedia.org/wiki/Port_and_starboard

    [14]: 11–12 To set forth these navigational rules, the terms starboard and port are essential, and to aid in in situ decision-making, the two sides of each vessel are marked, dusk to dawn, by navigation lights, the vessel's starboard side by green and its port side by red. [14]: 15 Aircraft are lit in the same way.

  3. Polynesian navigation - Wikipedia

    en.wikipedia.org/wiki/Polynesian_navigation

    Polynesian navigation or Polynesian wayfinding was used for thousands of years to enable long voyages across thousands of kilometres of the open Pacific Ocean. Polynesians made contact with nearly every island within the vast Polynesian Triangle , using outrigger canoes or double-hulled canoes.

  4. Lock (water navigation) - Wikipedia

    en.wikipedia.org/wiki/Lock_(water_navigation)

    A plan and side view of a generic, empty canal lock. A lock chamber separated from the rest of the canal by an upper pair and a lower pair of mitre gates.The gates in each pair close against each other at an 18° angle to approximate an arch against the water pressure on the "upstream" side of the gates when the water level on the "downstream" side is lower.

  5. Navigational instrument - Wikipedia

    en.wikipedia.org/wiki/Navigational_instrument

    Marine chronometer used to determine time at the prime meridian with great precision which is necessary when reducing sights in celestial navigation. Nocturnal used to determine apparent local time by viewing the Polaris and its surrounding stars. Ring dial or astronomical ring used to measure the height of a celestial body above the horizon ...

  6. The United States Navy Is Fielding Dozens of These Destroyers

    www.aol.com/united-states-navy-fielding-dozens...

    The Avenger class’s primary sensor systems are the AN/SSN-2 Precise Integrated Navigation System, AN/SQQ-32 Mine Hunting Sonar System, AN/SPS-55 Surface Radar System, and AN/WSN-2 Gyro Compass ...

  7. McClellan–Kerr Arkansas River Navigation System - Wikipedia

    en.wikipedia.org/wiki/McClellan–Kerr_Arkansas...

    A map of the McClellan–Kerr Arkansas River Navigation System. The McClellan–Kerr Arkansas River Navigation System (MKARNS) is part of the United States inland waterway system originating at the Tulsa Port of Catoosa and running southeast through Oklahoma and Arkansas to the Mississippi River. The total length of the system is 445 miles (716 ...