Alvin Science Verification Cruise
HOV Alvin March 2014
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Archive for Chris German

Imaging Tips for Alvin Divers

Posted by Cherie Winner 
· Wednesday, March 26th, 2014 
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Focusing while fully zoomed in assures best clarity when you zoom back out to see a larger field of view. (Courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution)
By lining up video cameras on either side of the sub during a transit, scientists can record a rolling view of the seafloor five times wider than Alvin’s basket (Courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution)
Use the Iris setting on the camera controller to adjust exposure. In general, it is easier to "rescue" under-lit images than images that are too brightly lit. (Courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution)
The key to capturing good images and video underwater is lighting. Alvin’s new lights and ability to move sideways make it easier than ever to set up a great shot. (Courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution)

Chris German, outgoing chief of the National Deep Submergence Facility at Woods Hole Oceanographic Institution, has prepared guidelines for making the best use of Alvin’s improved lighting, imaging, and video data collection systems. The guidelines are based on the experience of scientists who participated in the Science Verification Cruise (SVC). Read More →

Lighting Up the Seafloor

Posted by Lonny Lippsett and Chris Linder 
· Sunday, March 23rd, 2014 


Video courtesy of Peter Girguis, chief scientist, Harvard University; Funded by NSF, ONR, and NOAA; ©Woods Hole Oceanographic Institution. Production and editing by Chris Linder, WHOI)

You’ve got action: deep-sea creatures doing their things at the bottom of the ocean. You’ve got cameras: new high-definition ones on the submersible Alvin. And you’ve got new LED lights. But to achieve the best imagery, every photographer knows that you can have the best cameras, and deftly zoom and adjust apertures, but those don’t mean a thing, if the light ain’t right. Read More →

Alvin’s Arm Exercises

Posted by Chris Linder 
· Saturday, March 22nd, 2014 

The upgraded Alvin added two new forward-looking viewports, and the sub’s two manipulator arms had to be adjusted so that they would not block the new views. The arms were given more flexibility at their shoulder joints so that they could swing farther out. A byproduct of that redesign is that the arms have extended their reach forward from 93 to 118 inches and expanded their coverage area from about 100 to 140 degrees.

Alvin pilots on this Science Verification Cruise are practicing working with Alvin‘s arms under field conditions on tasks they are routinely asked to perform, such as taking push cores to collect seafloor sediments and grabbing biological samples such as deep-sea clams. “After three years out of the water during the upgrade, it’s great to see the pilots get back into the swing of things,” said Chris German, chief scientist for the National Deep Submergence Facility at Woods Hole Oceanographic Institution. (Video courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution; Edited by Chris Linder, WHOI)

A Star(fish) is Born

Posted by Chris Linder 
· Friday, March 21st, 2014 

Chris German, chief scientist for the National Deep Submergence Facility at WHOI, talks about experiments going on to optimize Alvin‘s new lighting and camera systems during the Alvin Science Verification cruise. (Video courtesy of Peter Girguis, chief scientist, Harvard; Funding agencies: NSF, ONR, NOAA; ©Woods Hole Oceanographic Institution; Edited by Chris Linder, WHOI)

Tweaks and Troubleshooting

Posted by Lonny Lippsett 
· Friday, March 21st, 2014 
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Peter Girguis, chief scientist of the Alvin Science Verification Cruise, stands before the sub during nighttime tests of the sub's lighting. Scientists and engineers are experimenting with adding and positioning lights to optimize Alvin's imaging capabilities. (Photo by Chris Linder, Woods Hole Oceanographic Institution)
On Thursday, scientists on the Alvin Verification Cruise adjusted high-intensity LED lights on the sub’s “brow” and just above the forward viewports (not seen in this drawing) to perfect the lighting so they can obtain sharp, shadow- and glare-free photos and videos from the sub. (Illustration by E. Paul Oberlander, Woods Hole Oceanographic Institution)

The whole objective of this research cruise is to test a newly rebuilt Alvin equipped with upgraded systems that had never been used before by scientists under field conditions. Scientists and engineers expected hiccups and learning curves. After four test dives of Alvin, it was time to tweak, troubleshoot, and optimize. Read More →

The Road to Alvin‘s Road Test

Posted by Chris Linder 
· Wednesday, March 19th, 2014 
[vimeo 89494013 w=1000 h=562]

A conversation with Peter Girguis, chair of the Deep Submergence Science Committee (DESSC), and Chris German, chief scientist for the National Deep Submergence Facility (NDSF) at Woods Hole Oceanographic Institution (WHOI).

After a major rebuild of the nation’s only deep-sea research submarine, leaders of the upgrade project made an unconventional decision—organize an expedition of veteran Alvin users from many research fields and institutions to test the new sub and help its transition back into service for the nation’s scientific community. (Produced by Chris Linder, Woods Hole Oceanographic Institution)

 

About

From March 14 to 26, Peter Girguis, chair of DESSC (DEep Submergence Science Committee), will lead a group of scientists, including many veteran Alvin divers, from a host of research institutions to “road-test” the new vehicle on an expedition in the Gulf of Mexico. More »

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Rebuilding Alvin from Oceanus magazine

Participating Organizations

National Science Foundation
Office of Naval Research
National Oceanic and Atmospheric
   Administration
University-National Oceanographic
   Laboratory System
National Deep Submergence Facility
DEep Submergence Science Committee
Woods Hole Oceanographic Institution

Categories

Adam Soule Amanda Demopoulos Bruce Strickrott Chris German Chris Linder Cindy van Dover Cold seeps Control systems Corals DESSC Dive plan Electronics Ergonomics Florida Escarpment Galapagos General George Luther Heather Olins History Hydrothermal vents Jefferson Grau Jonathan Howland Kang Ding Launch Life support system Lighting & imaging Lost City Manipulator arms MC036 NDSF Pat Hickey Personnel sphere Peter Girguis Pilots Sample basket Scott McCue Students Susan Humphris Thrusters Upgrade Verification cruise Video Feature Viewports VK862 Weather
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