Question 1853Navigation General70% to pass
A rock and sand structure extending from the bank of the river toward the channel is known as a _______________.
AI Explanation
The correct answer is A) wingdam.
A wingdam is a rock and sand structure that extends from the bank of a river or waterway towards the channel. Wingdams are constructed to help control the flow of water and prevent erosion of the riverbank. They are a common feature in many navigable waterways in the United States, including those under the jurisdiction of the US Coast Guard.
The other answer choices are incorrect because:
B) Landwall refers to a retaining wall built along the shoreline, not a structure extending into the water.
C) Cutoff refers to a new channel formed when a river cuts across a meander, not a structure built on the bank.
D) Towhead refers to a small, low-lying island in a river, not a structure built on the bank.
Related Questions
#1851 When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should _______________.#1852 When you are steering on a pair of range lights and find the upper light is above the lower light you should _______________.#1854 A structure, usually made of stone, or cement pilings, which extends from the bank at approximately right angles to the current is called a _______________.#1855 A tow that is properly aligned to pass through a narrow opening between two bridge piers is " ". #1856 The abbreviation L.W.R.P. on the navigation maps means _______________.