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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. PEL sector light - Wikipedia

   en.wikipedia.org/wiki/PEL_sector_light

   A large PEL sector light installation at the Port of Durban Original Porirua Harbour PEL. The PEL sector light is a projector style marine beacon which is used to guide maritime vessels. It does this by projecting a colored sector out to sea with very sharp color changes as the mariner transitions from one sector to the next.

4. Marine chronometer - Wikipedia

   en.wikipedia.org/wiki/Marine_chronometer

   A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), and the time at the current location found from observations of celestial bodies.

5. Timeline of transportation technology - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_transportation...

   1839 - An early electric boat was developed by the German inventor Moritz von Jacobi in 1839 in St Petersburg, Russia. It was a 24-foot (7.3 m) boat which carried 14 passengers at 3 miles per hour (4.8 km/h). It was successfully demonstrated to Emperor Nicholas I of Russia on the Neva River.

6. AOL Mail

   mail.aol.com/d?reason=invalid_cred

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. Los Angeles-class submarine - Wikipedia

   en.wikipedia.org/wiki/Los_Angeles-class_submarine

   The U.S. Navy gives the maximum operating depth of the Los Angeles class as 650 ft (200 m), [16] while Patrick Tyler, in his book Running Critical, suggests a maximum operating depth of 950 ft (290 m). [17] Although Tyler cites the 688-class design committee for this figure, [18] the government has not commented on it.