Structural features with regard to Holds, cargo, double bottom and peak tanks

Question 1

what are cargo holds

Answer 1

holds are large under deck spaces which are used to stow cargo and stores

Question 2

Draw and label the structural features of a cargo hold (ship type: general cargo ship)

Question 3

State the role and function of a double bottom tank

Answer 3

A double bottom tank on a ship serves as an additional layer between the sea and the ship’s bottom internal space. It’s like having a second skin on the bottom of the ship. This space is often used to store fuel, fresh water, or ballast water, which helps to stabilize and balance the ship during its voyage.

Question 4

How are double bottom tanks usually framed?

Answer 4

Double bottom tanks are usually framed with longitudinal members (running lengthwise along the ship) and transverse members (running across the ship). These frames provide structural support and help to compartmentalize the tank so that it can contain liquids securely.

Question 5

What does double bottom tank help to protect against?

Answer 5

The primary purpose of double bottom tanks is to protect against grounding and minor impacts that could puncture the ship’s hull. By having this extra space at the bottom, even if the outer bottom is breached, the ship is less likely to flood or leak pollutants into the sea. Additionally, it provides an extra layer of protection against environmental damage, such as oil spills, by containing any leakage from the ship’s own tanks.

Question 6

What is the role and function of the fore peak?

Answer 6

-Primary role and function are to store heavy anchor chains and other equipment related to anchoring and mooring the ship. It helps to keep these items organized, secure, and protected from the elements.

-forepeak can contribute to maintaining the ship's balance and stability by distributing weight towards the front of the vessel.

Question 7

state what the forepeak houses

Answer 7

It houses the forecastle store, chain lockers and the forepeak water ballast tank which aids the vessel’s trim.

Question 8

state the role and function of an aft peak tank

Answer 8

Normally used for the storage of fresh water or ballast and it provides a degree of protection to all spaces forward of the aft peak bulkhead.

Tank assists with stability, trim, and propeller submersion

Question 9

state what is housed in the aft peak region

Answer 9

-Ballas
-Stern tube and propeller shafts
-bilge and drainage systems
-storage