Buttermilk Channel
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Buttermilk Channel is a small tidal strait in Upper New York Bay in New York City, approximately 1 mile (1.6 km) long and 0.25 miles (0.40 km) wide, separating Governors Island from Brooklyn. The channel is marked by a number of navigation aids (green cans no. 5 and 7 at the northeast entrance, and green gong no. 1, marking low water off the tip of Governors Island). Tidal currents on the channel are rather strong.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/8/85/Wpdms_terra_buttermilk_channel.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/BrooklynMap1766.jpg/640px-BrooklynMap1766.jpg)