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Since then she has undertaken several campaigns, which included depth sounding, current measuring, water sampling and bottom sampling.
The Natural Resources Ministry of Russia announced that the bottom samples collected from the expedition are similar to those found on continental shelves.
Throughout this part of the voyage a regular programme of depth soundings, trawls, and sea-bottom samples provided a comprehensive record of the oceanography and marine life of the Weddell Sea.
While en route Guam from Palau, she collected a 13-foot ( 4-meter ) bottom core sample from the Mariana Trench and made a GEP profile and took bottom samples west of Guam.
Small bottom-dwelling micromollusks such as " Pisidium " species are found by scooping a bottom sample of mud into a fine meshed long-handled net, and then agitating it and moving it through the water repeatedly, until only solid particles remain in the net.
After a port call, she put to sea again on 1 May 1963, making Nansen bottle casts, collecting bottom samples & ndash; including a seven-foot ( 2.1-meter ) core sample taken at a depth of 22, 170 feet ( 5, 822 meters ) in the Aleutian Trench & ndash; studying currents with drift bottles and a 54 degrees North latitude.