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ROV Ventana

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Emma Schauder

on 13 March 2013

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Transcript of ROV Ventana

ROV VENTANA a remotely operated vehicle (ROV)
built for the Monterey Bay Aquarium Research Institute
manufactured in 1987 by International Submarine Engineering of Port Moody, British Columbia, Canada
delivered in 1988
specifications developed by David Packard VENTANA is... What does she look like? first model was about 8ft x 4.5ft x 4.5ft
in her 26 years of life, has nearly doubled in size
now, she is is about 6ft x 8ft x 8ft
has the 5 main components of ROVs: a tether, a floatation device, ballasts, thrusters, cameras, and lights
she also has manipulator arms for grabbing, moving, or placing items in the sea
her floatation device is full of millions of tiny, glass beads, the size of a pinhead that can withstand the pressure in deep waters up to 1850 meters (about 1 mile deep)
her tether is 2,100 meters long (6890 feet) COOL FACTS
=) the International Submarine Engineering in British Columbia created the Spanish name for its destiny: “Ventana” or “window” into the ocean depths
Ventana has a 97% success rate for MBARI
"Olive Oyl" is the official mascot of the ROV Ventana • Ventana has logged more underwater dive time than any other research ROV in the world, having performed more than 3,000 dives as far south as the Santa Barbara Basin and as far north as Orego
• In December 2011, MBARI retired its workhorse research vessel, Point Lobos, after 23 years of service, and purchased a new coastal and regional vessel, the R/V Rachel Carson (the Rachel Carson was eventually outfitted to serve as a host vessel for ROV Ventana) Speaking of the Point Lobos... • Point Lobos is a 33-m (110-ft) converted oil field support ship
• hydraulically powered Ventana is launched by crane from the deck of the R/V Point Lobos over the side of the ship
• tethers supply electricity to Ventana through cables and relay information through hair-thin fiber optic cables, which enables the pilot to drive or "fly" Ventana AND they bring data and video images from underwater back to the ship to be recorded ROV Ventana is UNMANNED
the control room in the operating ship is set up comfortably for four cruise participants: the ROV navigator, ROV pilot, chief scientist, and assistant scientist
the scientist controls the main video camera and points out targets of interest to the pilot who maneuvers the ROV to keep the target in view (they must work together!)
accurate ship/ROV navigation is achieved with a Trimble Differential GPS system with an accuracy of ±2 m for the ship and a Ferrante Trackpoint II short baseline acoustical system for locating the ROV or other marked targets What awesome gadgets does she have? 1 big HD camera and 9 smaller cameras for still and video shots of sea life, geology, and experiments a CTD unit for measuring conductivity (as a proxy for salinity), temperature, and depth deep-water flotation devices made of syntactic foam (special high density foam that will not crush at its designated depth) six lights, about as bright as an automobile’s, specially made so that the colors of the animals are correct as in natural sunlight (the creatures at the bottom of the ocean look the same as the creatures would if they were out in bright daylight) a mechanical arm with seven degrees of movement (in order to mimic human arm motion) that allows the pilots, upon the scientists' request, to grab and move all kinds of things deep under the water sensors and samplers for collecting data from the ocean and seafloor:
one variable speed, multi-binned suction sampler capable of flow rates from 0 - 450 I/min (0 -120 gaLV/min)
four 75-1 "detritus samplers" which allow the animal and a surrounding volume of water to be enclosed and brought to the surface undisturbed and thermally insulated in prestine condition
(low flow rates are used for delicate gelatinous organisms and high rates are required for strong swimmers such as fish and squids) an underwater, diamond-toothed drill to take core samples of the hard rocks that underlie Central California more gadgets include... scanning sonar, flowmeters, oxygen sensors, a transmissometer, and a multi-beacon, ultra-short baseline system to relay the ROV’s position relative to the ship 5 EXPEDITIONS/RESEARCH MISSIONS: 1. In August 1988, Ventana set out on its first dive on a shallow reef off Pacific Grove and collected its first sample: a rock that years later was identified as a carbonate fragment (probably from a cold seep) 2. Ventana has many capabilities underwater... recently on January 14, 2013 (during a mission recovering an instrument from the MARS cabled observatory) Ventana had to reach the ocean floor, attach a float package to the instrument for recovery, and cut the weight off of the package. As the instrument free-floated to the surface, Ventana released water from its swimmies and carried the 280lb weight back to the surface. 3. The USS Macon Wreck was first explored by a joint US Navy and MBARI expedition in the early 1990s and again in 2005 (major artifacts such as the biplanes were identified using the ROV Ventana, and a sidescan sonar survey revealed two wreckage fields each approximately 50 m in diameter) 4. Ventana is helpful for research... MBARI started two long-term biological monitoring projects using Ventana to study the numbers and types of animals living in the water column and on the seafloor. This involved flying the ROV along a straight line (a "transect") for a fixed period of time or a fixed distance, while taking high-resolution video images. 5. On its 2,000th dive, Ventana carried a benthic respiration system to measure the oxygen consumption of sediment-dwelling organisms and collected push cores of sediment from the Monterey Canyon (this accomplishment represented more than 8,920 hours that Ventana had explored the deep sea, and more research dives than any other ROV in the world) ADVANTAGES DISADVANTAGES a remotely operated vehicle (ROV) (rather than a human-occupied submersible) is a better workhorse of choice because it avoids therisk to human life underwater
the ability to work at depths beyond the reach of scuba divers and in complex habitats inaccessible to trawl surveys helps “fill the information gap” between nearshore and deep offshore habitats, and allows the development of more comprehensive management strategies of the ocean’s resources
Ventana has five different "science sleds" that technicians, under the guidance of scientists and the ROV pilots, outfit with any combination of arms, drawers, cores, collection tools, and a sundry of devices or instruments, which the ROV will use deep in the water for whatever particular science mission the scientists dream up (it is easy to switch the tools out from a biology dive to a geology dive, and it minimizes the turnaround time between dives)
Ventana is very hardy... after more than 20 years of service and over 3,000 dives, it still ventures down into the deep waters of Monterey Bay three or four days a week the mechanical arms of Ventana are strong and precise enough to pick up and bend a penny, but could be lethal if something goes wrong and the technology goes haywire (nothing has so far)
Ventana is very expensive $$$ because she is so large (she has $20,000 lights whose light bulbs cost $1000)
Ventana requires a large, dedicated support vessel for expeditions/missions
in addition to the actual mission, there's always something that needs to be done or fixed on Ventana, so the pilots, some of whom are engineers, need to prioritize since their time is so limited underwater (up to a couple hours)
once on site in the spot where the ROV deploys, the waves, wind, swell need to constantly be checked to keep the boat steady and the tether safe (if the boat drifts away, then the tether which connects the sub to the boat, could pull Ventana and interfere with the work for the ROV pilots) WORKS CONSULTED: •http://www.mbari.org/dmo/vessels_vehicles/ventana/ventana.html •http://www.mbari.org/dmo/vessels_vehicles/rov.html •http://www.mbari.org/twenty/ventana.htm •http://www.mbari.org/news/homepage/2004/auv-rov.html•http://www.facebook.com/pages/Monterey-Bay-Aquarium-Research-Institute-MBARI/108372732570606 •http://www.mbari.org/news/homepage/2011/PointLobos/lobos-tribute.html •http://www.polartrec.com/expeditions/antarctic-seafloor-ecology/journals/2010-08-25 •http://www.polartrec.com/expeditions/antarctic-seafloor-ecology/journals/2010-09-05 •http://photos.mercurynews.com/2012/07/19/monterey-bay-aquarium-research-institute-turns-25/#15 •http://onlinelibrary.wiley.com/store/10.1029/93EO00275/asset/eost9666.pdf;jsessionid=2EB638EAA20F6D6EE564A9B98B1AF552.d03t03?v=1&t=he6eaopk&s=22225425516c9e9707757bc07206f648b29a521a •http://archive.rubicon-foundation.org/xmlui/bitstream/handle/123456789/9370/AAUS1991_11.pdf?sequence=1 •http://books.google.com/books?id=VUTlNc7zSKsC&pg=PA92&lpg=PA92&dq=rov+ventana+expedition&source=bl&ots=Vw4zAO8Eo9&sig=p2XkgAVPyJPrHsFn-0T1KBEfMY0&hl=en&sa=X&ei=uR4_UZbuD4za8wS904CAAQ&ved=0CFMQ6AEwBg#v=onepage&q=rov%20ventana%20expedition&f=false
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