Old Kilpatrick (55°55'N., 4°27'W.) (World Port Index No. 33460), a town on the N side of the River Clyde and 1 mile upstream of Bowling, has an oil tanker wharf, 135m long with depths of 7.6 to 8.7m alongside, situated 0.5 mile above Erskine Bridge. A tanker must hoist the International Code answering pennant by day, or two lights, red above white, at night when docking and undocking.

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