A Day On Wikipedia

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”’DeepSea Power & Light”’ (San Diego, CA, USA) was founded in 1983 as a manufacturer of high end underwater lights, cameras, topside camera control units, pressure compensated batteries, and high performance hollow ceramic spheres. Their domestic and international customers represent marine and freshwater oceanographic research, offshore mineral recovery, salvage, dams and waterways, boating, government, military, and nuclear power. DeepSea also operates multiple chambers in an on-site pressure test facility, with some capable of pressures to 30,000 psi.
DeepSea’s products are used from the surface of the sea, to the bottom of the Mariana Trench, the deepest ocean trench on our planet.

National Geographic Society (http://ngm.nationalgeographic.com/ngm/0302/feature5/index.html), Woods Hole Oceanographic Institution (http://www.whoi.edu), Lockheed-Martin Marine Systems (http://www.lockheedmartin.com) , Oceaneering (http://www.oceaneering.com/index.asp), Scripps Institution of Oceanography (http://www-sio.ucsd.edu), and the deep diving submersibles Alvin (http://www.whoi.edu/page.do?pid=8422), Sea Cliff, Jason (http://www.whoi.edu/page.do?pid=8423), Turtle, Nautille (http://www.ifremer.fr/fleet/systemes_sm/engins/nautile/nautile.htm), Mirs I & II, Kaiko, and the Shinkai 6500, all use lights and cameras from Deepsea Power & Light.

DeepSea Power & Light is headquartered in 36,000 square feet of green, high tech manufacturing space. Included in the plant are environmental and pressure testing facilities, a complete machine shop, Computer Aided Drafting stations, electronics lab, cable shop, and production facilities.

Contents
1. Pressure Compensated Batteries
2. Underwater Lights
3. Boating
4. Underwater cameras
5. Camera Control Units
6. Ceramic spheres
7. Famous Projects which used DSPL underwater lights
8. See Also
9. References
10. Further Reading
11. External Links

1. Pressure Compensated Battery
The SeaBattery is a lead acid battery designed for full immersion in the ocean. Because it is oil filled and designed to equilibrate to ambient pressure, it can operate at any depth of the ocean. The compensating oil has a specific gravity less than the electrolyte of the battery, and floats above it. A flexible lid separates the oil from the seawater, and allows the oil to compress to a smaller volume as pressure increases.

2. Underwater Lights

Gas and filament lights require a protective housing to avoid the crushing ocean pressure. The housing may also hold the reflector, made to create a flood or wide angle beam.

Examples if gas or filament lamps include:
Halogen (http://en.wikipedia.org/wiki/Halogen_light)
HID (http://en.wikipedia.org/wiki/High-intensity_discharge_lamp)
HMI (http://en.wikipedia.org/wiki/HMI_light)

LEDs are solid state devices and inherently able to tolerate high ambient pressures. They must be electrically isolated from seawater, however, so an oil pressure compensation system may be used. Advances in high brightness LEDs (http://en.wikipedia.org/wiki/Light_Emitting_Diodes#High_power_LEDs), in both efficacy (http://en.wikipedia.org/wiki/Efficacy#Lighting) and ruggedness, will make them the dominant light source in the sea within a very few years.
(http://en.wikipedia.org/wiki/LED)

3. Boating
Through hull lights
Boaters use underwater lights to improve fishing, enhance the appearance of their boats, and increase their visibility in high traffic areas. Lights may be welded-in or clamp-in style. Options for light sources are Halogen, HID, and LED.

Through hull cameras
Boaters use through hull cameras positioned to see a fouled propeller, water under the keel, or survey a potential dive site.

4. Underwater cameras
OEM camera modules (http://en.wikipedia.org/wiki/Original_equipment_manufacturer) are fitted within a pressure proof housing behind an optically clear window, and fitted with an underwater electrical connector.
Digital Still (http://en.wikipedia.org/wiki/Digital_Camera)
(more to follow)
Digital video (http://en.wikipedia.org/wiki/Digital_Video)
(more to follow)
5. Camera Control Units
DVR (http://en.wikipedia.org/wiki/Digital_Video_Recorder)
(more to follow)
6. Ceramic spheres (http://en.wikipedia.org/wiki/Ceramic)
(more to follow)
7. Famous Projects
‘Titanica’ (1995) (http://movies.nytimes.com/movie/174282/Titanica/overview)
‘Titanic’ (1997) (http://en.wikipedia.org/wiki/Titanic_(1997_film)
Bismarck Expedition (2002) (http://en.wikipedia.org/wiki/Battleship_Bismarck#See_also)
‘Ghosts of the Abyss’ (2003) (http://www.imdb.com/title/tt0297144/)
Titanic Mir Expedition (2003) (http://en.wikipedia.org/wiki/Titanic)
A photograph of the bow of the Titanic made using DSPL’s lights.
(http://en.wikipedia.org/wiki/Image:Titanic-bow_seen_from_MIR_I_submersible.jpeg)
Edmund Fitzgerald Expedition, National Geographic Society
(http://en.wikipedia.org/wiki/SS_Edmund_Fitzgerald)
Hydrothermal vent fields (http://en.wikipedia.org/wiki/Hydrothermal_vent)

8. See Also
9. References
10. Further Reading
11. External Links

[[http://en.wikipedia.org/wiki/Halogen_light|Halogen Lamp]]
[[http://en.wikipedia.org/wiki/High-intensity_discharge_lamp|HID Lamp]]
[[http://en.wikipedia.org/wiki/HMI_light|HMI Lamp]]
[[http://en.wikipedia.org/wiki/LED|LED Light]]
[[http://en.wikipedia.org/wiki/Original_equipment_manufacturer|OEM Camera Modules]]
[[http://en.wikipedia.org/wiki/Digital_Camera|Digital Still]]
[[http://en.wikipedia.org/wiki/Digital_Video|Digital Video]]
[[http://en.wikipedia.org/wiki/Digital_Video_Recorder|DVR]]
[[http://en.wikipedia.org/wiki/Ceramic|Ceramic Spheres]]
http://movies.nytimes.com/movie/174282/Titanica/overview
[[http://en.wikipedia.org/wiki/Titanic_(1997_film)|””’Titanic (1997)””’]]
[[http://en.wikipedia.org/wiki/Battleship_Bismarck#See_also|Bismarck Expedition (2002)]]
http://www.imdb.com/title/tt0297144/
[[http://en.wikipedia.org/wiki/Titanic|Titanic Mir Expedition]]
[[http://en.wikipedia.org/wiki/Image:Titanic-bow_seen_from_MIR_I_submersible.jpeg|Bow Photograph]]
[[http://en.wikipedia.org/wiki/SS_Edmund_Fitzgerald|Edmund Fitzgerald Expedition]]
[[http://en.wikipedia.org/wiki/Hydrothermal_vent|Hydrothermal Vent Fields]]