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They cannot , however , continue out of the Iceland Sea along the Greenland slope , since the sill depth in Denmark Strait , between Greenland and Iceland , is only about 600 m. Upon arrival at the planned location , the precision depth recorder ( PDR ) in the underway geophysics laboratory indicated a depth of ~ 2896 meters below rig floor ( mbrf ) ( 2885 mbsl ) , quite different from the expected depth . When sea level was low the climate in the area was more continental across a large area of the Arctic , and when sea level was high the flow of water from the North Pacific Ocean through the Bering Strait between Russia and Alaska , where the sill depth is 50 meters ( 165 feet ) , affected the freshwater and nutrient balance of the Arctic and the North Atlantic . The sill depth between Greenland and Jan Mayen exceeds 1600 m , with a trough cutting southward across the western part of that passage near the location of station 248 , where Figure 5 shows a maximum salinity of 34.917 near 1300 m. ( Other stations in this southernmost section were in water insufficiently deep to define a salinity maximum . The results show a consistent picture of the eddy diffusivity reaching median values of 40 x 10-4 m2 s-1 near the region of the sill depth and decreasing above and below it . The modern water depth is appropriate to monitor the PCW south of Carnegie Ridge , roughly at the sill depth of Panama Basin . It 's nice , it 's fun and there 's some prestige to being in some of these magazines , but there 's no real depth . The mudline was verified at 5.2 m higher than indicated by the precision depth recorder ( PDR ) . It has 55 slips , a marked entry channel with an approach depth of 6 feet , a dockside depth of 6 feet , a 35-ton lift , a storage yard for do-it-yourself repair work , marine supplies , electricity and showers . The use of the precision depth recorder to map the sea bed using echo sounding allowed us for the first time to see what the deep ocean floor was like . There are no curves , no real depth , no movement , no forces .