Sea Technology

JUL 2017

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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www.sea-technology.com July 2017 / st 33 for equipment, such as additional sets of lasers. There are two permanent Insite Pacific Nova miniature color cameras with integrated LED lights attached to the skid. The Nova cameras provide 400 TV lines of resolution and are depth rated to 4,000 m. The first camera is mounted on the back of the collection skid pointing at the suction carousel buckets, which allows the scientist to confirm the object that is being sucked up arrives in the bucket, and also allows the scientist to record which one of the five buckets a particular sample is in. The second camera is mounted on the manipulator, which gives the scientist an additional angle when picking up items or using the suction hose to pick up items. A third Nova camera is mounted high on the front of the ROV and pointed down to give the scientist an overview of the manipulator and bio box. This camera allows the ability to place particular samples in particular segments of the bio box and gives another angle of the ma- nipulator to assist in collecting samples. Operations with the Skid UVP is a two-man team with one person operating the ROV and the other person in charge of tether management outside on deck. Due to the fact that both ROV pilots/tech- nicians are occupied during ROV dives, scientists have been primarily responsible for operating the manipulator and collection skid graphical user interface (GUI) located on a touchscreen monitor where the chief scientist sits during ROV dives. This gives the scientist easy control over open- ing and closing of the bio box, rotating the suction bucket carousel, and adjusting suction hose variability and speed. UVP has found that if a single scientist is responsible for operating the manipulator and collection skid GUI during each cruise (instead of having multiple scientists take turns collecting samples), production increases dramatically. When the sample collection skid is in use, ship require- ments change quite a bit. It typically takes anywhere be- tween 2 and 10 min. to collect a sample, depending on difficulty and sample type. This means the ship must stay above or very close to the ROV's position in the water col- umn during this time. Ships with dynamic positioning and smaller ships around 100 ft. are ideal for sample collection operations due to their ability to stay in one location for an extended amount of time. Using larger ships that don't have complex dynamic po- sitioning systems complicates sample collection missions or makes them impossible in many situations. These same larg- er ships are used for typical ROV operations when sample collection is not required due to the fact that the ROV can move constantly with the ship. (Top and Bottom) Collection skid GUI. Suction sampler rotating carousel with sponge specimens post dive in the Gulf of Mexico May 2015. (Photo Credit: Brian Cousin, HBOI)

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