Question:
Which of the following structures is/are mainly used for harbor berthing?
Which of the following structures is/are mainly used for harbor berthing?
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Ask which of the four is actually a place a ship ties up, and which one is an offshore platform foundation.
Updated On: Jul 28, 2026
- Dolphins
- Jetty
- Quay
- Jacket
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Verified By Collegedunia
The Correct Option is A, B, C
Solution and Explanation
Step 1: Recall what berthing means.
Berthing is the act of bringing a ship alongside a fixed structure at the harbor so it can be tied up, loaded or unloaded safely. The structure has to give the ship a place to lie alongside and take mooring lines and fenders.
Step 2: Check each structure against that job.
Dolphins are isolated pile or caisson clusters built off the main quay line specifically to take a ship's mooring lines and absorb berthing impact, so they are a berthing aid. A jetty is a structure projecting out from the shore that a ship comes alongside or ties up against, so it is a berthing structure. A quay is a solid structure built parallel to and along the shoreline, the most common berthing face in a harbor, so it also qualifies.
Step 3: Rule out the jacket.
A jacket is a tubular steel support frame used to hold up an offshore platform topside above the seabed. It is a foundation structure for fixed offshore platforms, not a place where a ship berths, so it does not belong in this list.
Final Answer:
Dolphins, jetty and quay are berthing structures; the jacket is not. \[ \boxed{\text{A, B and C}} \]
Berthing is the act of bringing a ship alongside a fixed structure at the harbor so it can be tied up, loaded or unloaded safely. The structure has to give the ship a place to lie alongside and take mooring lines and fenders.
Step 2: Check each structure against that job.
Dolphins are isolated pile or caisson clusters built off the main quay line specifically to take a ship's mooring lines and absorb berthing impact, so they are a berthing aid. A jetty is a structure projecting out from the shore that a ship comes alongside or ties up against, so it is a berthing structure. A quay is a solid structure built parallel to and along the shoreline, the most common berthing face in a harbor, so it also qualifies.
Step 3: Rule out the jacket.
A jacket is a tubular steel support frame used to hold up an offshore platform topside above the seabed. It is a foundation structure for fixed offshore platforms, not a place where a ship berths, so it does not belong in this list.
Final Answer:
Dolphins, jetty and quay are berthing structures; the jacket is not. \[ \boxed{\text{A, B and C}} \]
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