Alex Salmond and his Scottish National Party hope tidal power will propel Scotland to independence....

As the tide enters the Pentland Firth on the northern tip of the United Kingdom, it can reach a speed of 16 knots — enough to push a ship off course.

Generations of sailors have treated the strait separating the Orkney Islands from the Scottish mainland with respect. Now Scotland's First Minister Alex Salmond is hoping the raging waters can help propel to him victory in May's Scottish parliamentary elections.
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