Old Sow
In the background Deer Island Light, used to mark the approach into the bay. In the foreground rapids created by Old Sow, the largest tidal whirlpool in the Western Hemisphere. With tidal ranges of 26 feet and tides occurring twice a day, it is not uncommon for tidal currents to approach 5-7 knots. 5-7 knots of tidal current has the same effect on a ship as 150-200 knots of wind.
ISO 64
1/900 sec
f/4.8
17 mm
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