Vessel Handling in Rivers and Estuaries

Question 1

The effect known as “bank cushion” acts in which of the following ways on a single- screw vessel proceeding along a narrow river?

Answer 1

It forces the bow away from the bank.

Question 2

For the deepest water when rounding a bend in a river, you should navigate your vessel __________________.

Answer 2

Toward the outside of the bend

Question 3

A V-shaped ripple with the point of the V pointing upstream in a river may indicate a _____________________.

Answer 3

Towed-Under Buoy

Question 4

Two vessels are abreast of each other and passing port to port in a confined waterway. What should you expect as your bow approaches the screws of the other vessel?

Answer 4

Your bow will sheer towards the other vessel.

Question 5

A wedge of water building up between the bow and nearer bank which forces the bow out and away describes _____________.

Answer 5

Bank Cushion

Question 6

A vessel proceeding along the bank of a river or channel has the tendency to ___________.

Answer 6

Sheer away from the bank

Question 7

In order to reduce your wake in a narrow channel you should _________________.

Answer 7

Reduce your speed

Question 8

A snag or other underwater obstruction may form a ____________________________.

Answer 8

V-shaped ripple with the point of the V pointing upstream

Question 9

A condition where two currents meet at the downstream end of a middle bar can be determined by a _______________________.

Answer 9

V-shaped ripple with the point of the V pointing downstream

Question 10

River currents tend to __________________.

Answer 10

Cause the greatest depth of water to be along the outside of a bend