What does it indicate when a ship displays the International Code of Signals flag "O"?

When a ship displays the International Code of Signals flag "O," it indicates that there is a man overboard situation. This is a critical signal used in maritime operations to alert personnel on other vessels and individuals nearby that someone has fallen from the ship into the water. The use of flag signals such as this is vital for immediate response and coordination during emergencies at sea. Recognizing and understanding these signals can be essential for maintaining safety and ensuring swift actions are taken by crew members and others nearby to assist in a potential rescue.