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05/11/2006 |
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| Home | Included
in our oceanographic surveys is current measuring. We do this by
using a drogue, we put the drogue in at one point, mark it with the GPS
(Global Positioning System),
sail around for 15 minutes and then return to it, GPS
marking it again upon
pickup.
By measuring the distance between these two points we
can then work out what the current is at this point. We do this at
position N1,N2, and N3. We use weights with 1.5m and 15m lengths
of rope, to measure the current at these two depths.
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Current Measurements