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Modern underwater video lights are now relatively small, have run times of 45–60 minutes and output 600–8000 lumens. These LED lights are powered by Lithium-ion batteries and usually have a 5600 K (daylight) color temperature. [16]
An aquascope (also called bathyscope) is an underwater viewing device. It is used to view the underwater world often from dry land or a boat. It eliminates the water surface glare and allows viewing as far as water clarity and light permit. The underwater viewer can be used for observing reefs, checking boat moorings, secchi disks and other ...
Since the steering oar was on the right side of the boat, it would tie up at the wharf on the other side. Hence the left side was called port. [6] The Oxford English Dictionary cites port in this usage since 1543. [7] Formerly, larboard was often used instead of port. This is from Middle English ladebord and the term lade is related to the ...
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 ...
In this video, dozens of 15-18 inch speckled trout are attracted to a 1000 W green light mounted on a pier. A fishing light attractor is a fishing aid that uses lights attached to a structure above water or suspended underwater to attract fish and members of their food chain.
Vertical light rays of the lamp are redirected into a horizontal plane, and horizontally the light is focused into one or a few directions at a time, with the light beam swept around. As a result, in addition to seeing the side of the light beam, the light is directly visible from greater distances, and with an identifying light characteristic.