Harbour components and berthing: identify the correct statements regarding breakwaters, quay-wall features, and inclined quays.
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AAn artificial barrier constructed to enclose an area for safe anchorage is called a breakwater
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BThe smoothened protective surface or facing at the berthing face of a quay wall is referred to as fending
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CThe effective berthing length of inclined quays can be adjusted by changing the angle of inclination
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DAll the above.
Answer
Correct Answer: All the above.
Explanation
Introduction / Context:Breakwaters provide wave protection; quay walls provide a berthing face and retain fill; and layout choices such as inclined quays influence effective berth length and operations. Recognizing these terms is essential in harbour planning.
Given Data / Assumptions:
- Breakwaters are protective barriers forming sheltered basins.
- Quay walls often receive fendering/facing to protect both wall and ships.
- Geometry of inclined quays modifies effective berth length measured along the waterfront.
Concept / Approach:(a) A breakwater shields the interior waters for safe anchorage and manoeuvring. (b) Quay faces are fitted with fendering systems (battens, rub-strakes, elastomeric fenders) providing a smooth, energy-absorbing interface—often generically referred to as fending. (c) The projection of berth length along a skewed (inclined) quay depends on its angle, hence can be adjusted by geometry.
Step-by-Step Solution:Check (a): Correct definition of breakwater.Check (b): Protective smoothened/fendered face functions as the berthing interface—loosely called fending in practice.Check (c): Changing the inclination alters the available lineal berthing distance for a given waterfront frontage.Thus, all statements hold.
Verification / Alternative check:Harbour manuals describe breakwaters and berth-face fendering; plan geometry directly affects effective berth length.
Why Other Options Are Wrong:
- Selecting fewer than all omits accepted harbour design concepts.
Common Pitfalls:
- Confusing 'coping' (top cap) with 'fendering' (berthing protection).
Final Answer:All the above.