Your examiner asks: "What does 'watertight integrity' mean in the context of a RoRo vessel, and why is it discussed more on RoRo vessels than other ship types?"

A. Watertight integrity means the ship's subdivision (bulkheads, decks, doors, openings) is capable of preventing progressive flooding from spreading beyond the initially damaged space; RoRo vessels are discussed more in this context because their large open vehicle decks, by design, reduce the amount of internal subdivision available compared with a conventionally-subdivided cargo ship, making the watertight doors and closures that do exist especially critical to maintaining survivability after damage.

B. Watertight integrity refers only to the hull plating below the waterline and has no relationship to internal doors or bulkheads.

C. RoRo vessels are discussed less in this context than other ship types, since their open decks are considered inherently safer.

D. Watertight integrity concerns only weathertight hatch covers on deck, not internal compartmentation.

A. A RoRo vehicle deck is typically a large, open space with high fuel-load density (vehicles carrying their own fuel, sometimes with engines running during loading/unloading) and limited internal subdivision compared to cellular cargo holds — a fire can spread rapidly across the open deck with few barriers, which is why fixed fire-detection and fire-suppression systems on vehicle decks, and strict rules on running engines and smoking, are taken especially seriously.

B. RoRo vessels have no greater fire risk than any other cargo ship type; the open deck arrangement has no bearing on fire spread.

C. Fire risk on a RoRo deck applies only to vehicles carrying dangerous goods; ordinary private vehicles present no fire risk at all.

D. Vehicle deck fire risk is addressed solely by the IMDG Code, with no SOLAS Chapter II-2 RoRo-specific provision.

A. Crew should have RoRo-deck-specific familiarisation covering vehicle movement hazards, blind spots around larger commercial vehicles, designated pedestrian routes away from active vehicle lanes, awareness of exhaust fume accumulation risk from running engines, and high-visibility PPE — this familiarisation should happen before a new crew member is required to work the deck unsupervised, not learned informally on the job.

B. No specific training is required beyond the general safety induction given to all new crew on joining, regardless of department or task.

C. Only the stevedoring company's own staff need training; ship's crew working in the same space have no separate training requirement.

D. Vehicle deck familiarisation is required only for engine room crew, not deck department crew who actually work the cargo deck.