Which warning is indicated by a red square flag with a black square in the center?

A red square flag with a black square in the center is a universal maritime signaling device that indicates a storm warning. This signal is used to alert boaters and other watercraft operators about the presence of severe weather conditions that could impact safety on the water. Recognizing this warning is critical for reducing risks associated with storms, as it encourages boaters to take necessary precautions, such as seeking safe harbor or avoiding open water if possible.

Understanding the specific meaning of different flags is essential for ensuring safety while boating. While other options, such as a Small Craft Advisory or Gale Warning, indicate varying degrees of caution for smaller vessels, they are represented by different flag signals. The distinction between these signals helps boaters gauge the severity of conditions they may face while navigating water.