Your examiner asks: "What is meant by the 'one-compartment' and 'two-compartment' damage stability standard?"

A. A one-compartment standard requires the vessel to survive flooding of any single main watertight compartment (within the assumed damage extent) and remain afloat with adequate residual stability; a two-compartment standard requires survival even if any two adjacent compartments flood simultaneously — larger and passenger vessels are generally required to meet the more demanding two-compartment (or greater) standard, reflecting the greater consequence of their loss and typically larger size enabling more extensive subdivision.

B. These terms describe how many cargo holds a vessel has in total, not a flooding-survival standard.

C. The one-compartment standard is more demanding than the two-compartment standard, since fewer compartments mean less subdivision.

D. Compartment standards apply only to bulk carriers and have no application to any other ship type.

A. Report it immediately to the bridge/Master — do not wait to "confirm" the problem alone — note the apparent quantity/rate of ingress if safely observable, avoid taking any action (e.g. opening further compartments to investigate) that could inadvertently worsen flooding or compromise watertight integrity elsewhere, and stand by for instructions while keeping the area under observation if it is safe to do so.

B. Attempt to fully diagnose and resolve the source of ingress alone before reporting, to avoid raising a false alarm.

C. No report is necessary unless the water level visibly rises during the time you happen to be observing it.

D. Open adjacent compartments immediately to inspect for similar flooding, before reporting the initial finding.

A. Damage stability standards scale with vessel size, type and the consequence of loss — larger vessels and those carrying passengers represent a greater potential loss of life and asset value if lost, and (generally) have more internal volume/length available to provide additional subdivision, so regulations require them to survive a more demanding flooding scenario (e.g. two or more compartments) rather than the less demanding standard that might apply to a smaller vessel.

B. Vessel size has no bearing on the number of compartments a damage stability standard requires the vessel to survive; the same fixed number applies to every ship regardless of size or passenger status.

C. Smaller vessels are required to survive more simultaneously flooded compartments than larger ones, since they have less reserve buoyancy.

D. Passenger-carrying status has no bearing on damage stability standards; only cargo-carrying capacity is relevant.