Question

Which of the following structures is/are mainly used for harbor berthing?

• A. Dolphins
• B. Jetty
• C. Quay
• D. Jacket

Hint:

Ask which of the four is actually a place a ship ties up, and which one is an offshore platform foundation.

Answer 1

The Correct Option is A, B, C

This question is really about sorting port and harbor infrastructure from offshore platform infrastructure. Only structures that a ship can lie alongside and moor to count as berthing structures.

1. Dolphins: correct. These are clusters of piles or small caissons set apart from the main wharf, used to take mooring lines or to cushion a ship's approach, so they directly support berthing.
2. Jetty: correct. A jetty extends from the shoreline into the water and gives ships a berthing face on one or both sides, so cargo or passengers can be handled.
3. Quay: correct. A quay runs along the natural shoreline and is the everyday berthing wall found in most ports, built to let a ship lie flush against it.
4. Jacket: wrong. A jacket is the braced steel lattice that sits on the seabed and carries an offshore oil or gas platform's deck; it has nothing to do with tying up ships and is not found in a harbor's berthing area.

So dolphins, jetty and quay are all correct, giving the answer A, B and C.