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2. Navigational instrument - Wikipedia

   en.wikipedia.org/wiki/Navigational_instrument

   Charts are maps of the areas to be navigated with details specific to the marine environment. Computing aids: used in the necessary mathematical calculations. Today electronic computers or calculators are used. Other traditional aids used included tables (trigonometric, logarithms, etc.) and slide rules.

3. Satellite navigation device - Wikipedia

   en.wikipedia.org/wiki/Satellite_navigation_device

   Vehicle navigation on a personal navigation assistant Garmin eTrex10 edition handheld. A satellite navigation device or satnav device, also known as a satellite navigation receiver or satnav receiver or simply a GPS device, is a user equipment that uses satellites of the Global Positioning System (GPS) or similar global navigation satellite systems (GNSS).

4. Marshall Islands stick chart - Wikipedia

   en.wikipedia.org/wiki/Marshall_Islands_stick_chart

   The Marshallese recognized four main ocean swells: the rilib, kaelib, bungdockerik and bundockeing. [2] Navigators focused on effects of islands in blocking swells and generating counterswells to some degree, but they mainly concentrated on refraction of swells as they came in contact with undersea slopes of islands and the bending of swells around islands as they interacted with swells coming ...

5. AOL

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   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

6. Guidance, navigation, and control - Wikipedia

   en.wikipedia.org/wiki/Guidance,_navigation,_and...

   Skilled navigators can use the Moon, planets or one of 57 navigational stars whose coordinates are tabulated in nautical almanacs. Historical tools include a sextant , watch and ephemeris data. Today's space shuttle, and most interplanetary spacecraft, use optical systems to calibrate inertial navigation systems: Crewman Optical Alignment Sight ...

7. Submarine navigation - Wikipedia

   en.wikipedia.org/wiki/Submarine_navigation

   Celestial navigation using the periscope, or sextant—seldom used anymore due to advancement in technology; Radar navigation; radar signals are easily detected so radar is normally only used in friendly waters entering and exiting ports. With the implementation of a more advanced radar system, many new techniques have been implemented in this ...