USCG Cargo Operations and Stability 2 — Questions and Answers
Question 1: What is meant by the term 'deadweight tonnage' (DWT)?
- The weight of the vessel's hull alone
- The total weight a vessel can carry including cargo, fuel, stores, and crew (Correct answer)
- The weight of the vessel when fully loaded
- The weight of the vessel when empty
Correct answer: The total weight a vessel can carry including cargo, fuel, stores, and crew
Deadweight tonnage is the total weight a vessel can safely carry above its light displacement, including cargo, fuel, ballast, stores, and crew.
Question 2: What is the significance of the Plimsoll mark on a vessel?
- It indicates the vessel's maximum speed
- It shows the legal maximum load lines for different conditions and seasons (Correct answer)
- It marks the location of the bilge keel
- It identifies the vessel's registration port
Correct answer: It shows the legal maximum load lines for different conditions and seasons
The Plimsoll mark (load line mark) shows the maximum depth to which a vessel may be legally loaded under various sea and seasonal conditions.
Question 3: Dangerous goods carried by sea must be properly documented according to which international code?
- SOLAS Chapter II
- IMDG Code (Correct answer)
- MARPOL Annex I
- ISM Code
Correct answer: IMDG Code
The International Maritime Dangerous Goods (IMDG) Code governs the stowage, segregation, labeling, and documentation requirements for dangerous goods carried by sea.
Question 4: What is 'dunnage' used for in cargo operations?
- To calculate cargo weight
- To protect cargo from moisture and damage and prevent shifting (Correct answer)
- To measure cargo volume
- To label hazardous materials
Correct answer: To protect cargo from moisture and damage and prevent shifting
Dunnage consists of materials such as wood, matting, or airbags placed beneath or between cargo to protect it from moisture, damage, and shifting during the voyage.
Question 5: A vessel's trim is defined as?
- The angle of heel to port or starboard
- The difference in draft between the bow and the stern (Correct answer)
- The vessel's distance above the waterline
- The list caused by uneven loading
Correct answer: The difference in draft between the bow and the stern
Trim is the difference in draft between the forward and aft ends of the vessel; a vessel trimmed by the stern has a greater aft draft than forward draft.
Question 6: What is the minimum freeboard for a vessel under load line regulations?
- A fixed value of 12 inches
- The amount specified on the vessel's load line certificate for current conditions (Correct answer)
- 20% of the vessel's depth
- Determined only by the master
Correct answer: The amount specified on the vessel's load line certificate for current conditions
The minimum freeboard is the minimum distance from the waterline to the freeboard deck as specified on the vessel's load line certificate for the applicable zone and season.
USCG Cargo Operations and Stability 2
What is meant by the term 'deadweight tonnage' (DWT)?