The Saint-Philibert was a small cruise ship sailing in the summer from the mouth of the Loire and near the coast. On 14 June 1931, nearly 500 people, mostly workers and their families from Nantes, embarked in the port of Nantes. 467 passengers were checked in. There were also children accompanying their parents who were not counted. Seven men from the crew, supervised by Captain Ollive, were responsible for ensuring smooth passage for the ship. The outbound trip was normal and the St. Philibert docked at the Herbaudière on the Île de Noirmoutier.
When the vessel set sail for the return, the weather deteriorated later in the afternoon and the Saint-Philibert faced raging seas. The storm, of unknown force, made navigation very difficult. The ship was not prepared for bad weather. In addition, it had onboard twice the expected load. Passengers stood at the starboard, which made the ship heel dangerously and with a wave stronger than the others, the ship capsized and sank almost immediately off the Pointe Saint-Gildas. This disaster spared the lives of only 8 survivors.
A trial took place in 1933 and the victims' families were unsuccessful and the owners were free from any responsibility in the disaster.