Figure 6 shows a step-by-step process of how the multiple corer works to collect sediments. When the multiple corer is lowered to the seafloor, the turret first touches the bottom (Figure 6-1). The wire rope suspending the bottom sampler is then loosened, and the weight of the weights and the action of the water hydraulic damper cause the ascending section to slowly descend, allowing the mud sampler to penetrate into the sediment (Figure 6-2). When the wire is wound up to raise the elevator, the trigger that secures the upper and lower lids operates, closing the upper lid and releasing the lower lid to ride on the seafloor surface (Figure 6-3). When the wire is wound up further, the mud sampling pipe is pulled out of the sediment, and the lower lid of the pipe closes with it (Figure 6-4). Closing the top and bottom lids of the mud sampling tube prevents the collected sediment from falling and reduces the opportunity for the seawater directly above to come into contact with other seawater or the atmosphere.
