What flag indicates a man overboard and is made ready to break?

The flag that indicates a man overboard and is made ready to break is the Oscar flag. When displayed, the Oscar flag, which is a yellow flag with a blue square in the middle, signals that a person has fallen overboard and serves as a call for immediate assistance. This flag is an important part of maritime signaling, particularly in emergency situations, as it alerts other vessels to the emergency condition and the need for action to rescue the individual. The universal recognition of the Oscar flag emphasizes the critical nature of a man overboard situation, ensuring that vessels in the vicinity can respond appropriately to aid in the rescue efforts.