STCW Cargo Handling & Stability 3

Question 1

What is meant by 'reserve buoyancy' on a vessel?

Accepted Answer

The watertight volume of a ship above the waterline that provides additional floating capacity

Answer

Reserve buoyancy is the watertight volume of a ship's hull above the waterline; it provides additional buoyancy if the ship takes on water, delaying sinking.

Question 2

What makes a ship considered 'stiff' in terms of stability?

Accepted Answer

A very high GM resulting in short, rapid rolling periods

Answer

A stiff ship has a high GM, causing it to roll quickly and sharply with short periods, which can be uncomfortable and potentially damaging to cargo and structures.

Question 3

What is the primary danger of cargo shifting at sea?

Accepted Answer

It causes a list or sudden loss of stability, potentially leading to capsizing

Answer

When cargo shifts to one side, it causes an off-center weight distribution leading to a list; in severe cases, this loss of stability can cause the vessel to capsize.

Question 4

What is the purpose of an inert gas system (IGS) on a tanker?

Accepted Answer

To replace cargo vapors with a non-flammable gas mixture, preventing fire or explosion

Answer

An inert gas system introduces gas with an oxygen content below 8% into the cargo tanks to create an atmosphere that cannot support combustion, preventing the risk of fire or explosion.

Question 5

Under SOLAS, what must be done with a 'heavy lift' cargo item before loading?

Accepted Answer

Its weight must be accurately declared by the shipper, and a lift plan approved by the ship's master

Answer

Heavy lifts require accurate weight declarations from the shipper and a coordinated lift plan to ensure the ship's lifting gear and stability are adequate for safe loading and stowage.

(STCW) Standards Certification and Watchkeeping for Seafarers Practice Test

(STCW) Standards Certification and Watchkeeping for Seafarers Practice Test

STCW Cargo Handling & Stability 3