The flow of deep water across the axis of the Mid-Atlantic Ridge through the Charlie–Gibbs Fracture Zone near 52.5 °N was monitored for 7 days during June, 1970 with current meters moored 50 m and 650 m above the bottom in each of the two zonal channels of the fracture. Flow was west-going through the fracture. The mean rate of flow was about 3 cm/s with an oscillatory flow superimposed of semi-diurnal tidal period.

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