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At Saltstraumen, the world's strongest tidal current. Through this narrow passage near Bodø the tidal water rushes into and out of the Skjerstad fjord, changing direction four times during a day and a night. In the inner end of the fjord peak tides are delayed by two hours and the average difference between high and low tide is 1.06 meters whereas outside the obstruction it is 1.74 meters. Spring tide and the effect of strong winds may increase these figures considerably, and they say that the difference between water levels on both sides of the obstruction may sometimes reach one meter. Down in the current exists a rich life and sport fishing and diving here is popular. And potentially dangerous. The mountains in the bacground are called Børvasstindan, the highest one – Store Åseltind, second from the left – reaches 1177 meters.