Again, this is an exercise that begins at home. The speed and direction of currents obviously dictate the direction you may want to head as you set out. But the information is also absolutely vital for dealing with traffic. For example, currents will either boost or hinder a vessel s movement under certain conditions, something you need to know if you plan to cross ahead of it. When on the water, see just how the currents are really acting compared to the predictions in currents and tide tables.
Many factors can change things.
For example, heavy winds can alter the predicted times for flood and ebb cycles. Heavy winds can jack up effective speed of currents, and, if in opposition to the current, will result in higher seas that will affect your own ability to maneuver. Recognize that large vessels appear to be moving slower than they really are. This is the first of the three optical illusions you must take into account when judging vessel traffic. Check this deadly illusion out for yourself.