1.   He kept to the inside of the bends where the current was fastest and more powerful than the onshore wind.

2.   Here the current is so strong that the shape of the cataract is constantly changing.

3.   It was ebb tide and the current was in their favour.

4.   Strong currents can be very dangerous for swimmers.

5.   The current was not even sufficient to tug it loose again.

6.   And finally, the currents of history are at work.

7.   And they caution that the currents are dangerous in large part because they are so unexpected.

8.   Authorities said one man thought about diving into the water, but the currents were too strong.

9.   Because the currents are ever-changing, he explained, hot spots for blue and humpback whales move with the food.

10.   Because there are no currents on the canals, the ride is exceptionally smooth.