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2. 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.

3. Floodlight - Wikipedia

   en.wikipedia.org/wiki/Floodlight

   Floodlights Association football field at a sports center illuminated with floodlights.. A floodlight is a broad-beamed, high-intensity artificial light.It can provide functional area lighting [1] for travel-ways, parking, entrances, work areas, and sporting venues to enable visibility adequate for safe task performance, ornamental lighting for advertising, façades, monuments, or support ...

4. Ship floodability - Wikipedia

   en.wikipedia.org/wiki/Ship_floodability

   Compartmentalisation of a ship, to reduce floodability Parts of a water-tight compartment. Floodability is the susceptibility of a ship's construction to flooding.It also refers to the ability to intentionally flood certain areas of the hull for damage control purposes, or to increase stability, which is particularly important in combat vessels, which often face the possibility of serious hull ...

5. 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 ...

6. Electric boat - Wikipedia

   en.wikipedia.org/wiki/Electric_boat

   An electric boat is a powered watercraft driven by electric motors, which are powered by either on-board battery packs, solar panels or generators. [ 1 ] While a significant majority of water vessels are powered by diesel engines , with sail power and gasoline engines also popular, boats powered by electricity have been used for over 120 years.

7. Lead–acid battery - Wikipedia

   en.wikipedia.org/wiki/Lead–acid_battery

   The sum of the molecular masses of the reactants is 642.6 g/mole, so theoretically a cell can produce two faradays of charge (192,971 coulombs) from 642.6 g of reactants, or 83.4 ampere-hours per kilogram for a 2-volt cell (or 13.9 ampere-hours per kilogram for a 12-volt battery).