Yes, ferries have capsized, but it is rare. Ferries in Canada, and BC in particular, have a strong safety record, and the events that do happen almost always come down to a few known causes.
What causes a ferry to capsize
Most capsizing or overturning events involve severe weather, technical failure or human error, and often a mix of them.
- Rough weather. Strong, unpredictable waves and gale-force winds can exceed a vessel’s design limits, especially in fjord and coastal areas where gusts and high waves arrive suddenly. The crew’s quick response and adherence to safety procedures reduce casualties and damage when this happens.
- Overloading and uneven cargo. If vehicles are not distributed evenly, the centre of gravity shifts and the vessel can lose stability, including during boarding. Crew training in cargo management helps keep a ferry balanced.
- Technical failures. Engine breakdowns or steering malfunctions can lead to loss of control, particularly in a narrow passage. Regular maintenance and prompt repairs lower that risk.
- Human error. Misjudging sea conditions or making navigational mistakes contributes to many accidents. Training in emergency response and navigation reduces it.
How ferries are built and run to stay upright
Canada’s regulators enforce maintenance and operating procedures aimed at preventing these incidents. Ferries use ballast control systems to stay stable in rough seas, and watertight bulkheads and a sound hull reduce the risk of flooding that could lead to an overturn. Some vessels use active fins and roll stabilization systems for balance in waves or sudden manoeuvres.
Design also matters. A low centre of gravity and a wide beam improve stability, and hull shapes that spread weight efficiently reduce the tendency to list. Limiting cargo movement during a voyage helps too.
Crews watch the weather with monitoring equipment so they can change course early, and they train for emergencies and stability problems. Operators follow international safety standards, including those set by the IMO, and run regular safety audits to find weak points. Protocols are updated as new research and incident reviews come in.