1. SOLAS purpose and scope

The International Maritime Organization’s (IMO) 1974 Safety of Life at Sea Convention (SOLAS), as amended, sets minimum standards for ship construction, equipment, and operation. IMO describes a passenger ship as one carrying more than 12 passengers; application depends on voyage, ship type and size, and the implementing rules of the flag State. SOLAS passenger-ship rules generally do not apply directly to domestic voyages, although national rules may follow them. Do not assume every cruise ship has identical design requirements or procedures.

2. Compartmentation and flooding safety depend on the approved design

Watertight subdivision, stability, and survivability after flooding are assessed against the ship’s size and design, damage scenarios, applicable SOLAS amendments, and approval conditions. There is no single guarantee that every passenger ship can withstand flooding of two or more adjacent compartments. Watertight doors and subdivision can limit progressive flooding, but outcomes depend on the extent of damage and operating conditions. Passengers should follow crew instructions and onboard safety information.

3. Survival craft and passenger muster drills

SOLAS Chapter III covers lifeboats, liferafts, lifejackets, and related training and muster arrangements. Capacity and placement depend on the ship’s certification, service, and applicable rules; it is not accurate to say that lifeboats on each side always hold every passenger. SOLAS III/19 paragraph 2.2 requires newly embarked passenger muster before or immediately upon departure on voyages where passengers are scheduled to be onboard for more than 24 hours. Separately, paragraph 2.3 requires a safety briefing whenever new passengers embark, immediately before or after departure; it may be included in the applicable muster. SOLAS III/19 2.2–2.3 Learn the assigned assembly station, lifejacket instructions, and alarm signals, and follow crew directions in an emergency.

4. Locate your assembly station and ask about assistance

After boarding, match the cabin muster information to onboard signs and ask crew during the briefing about mobility assistance or a child-size lifejacket if needed. If an exit normally used is closed in an emergency, follow announcements and crew routing rather than insisting on a remembered shortcut. Muster does not itself mean boarding a lifeboat; do not select a survival craft and leave the assigned process on your own.

Sources

IMO: SOLAS overview · IMO: Passenger ships · IMO: Passenger muster amendment · IMO MSC.350(92): SOLAS III/19 amendment text