What signal best describes a gale warning?

A gale warning is a marine weather warning signifying that winds of 34 to 40 knots (39 to 46 miles per hour) are expected. The correct signal for a gale warning is represented by a white light above a red light. This signaling method is part of the international maritime communication system that helps sailors and 'Seafarers' understand and respond to hazardous weather conditions.

The white light above the red light clearly indicates to vessels that they need to exercise caution due to gale-force winds, allowing them to take necessary precautions to ensure safety. It's an essential component of navigational safety, as these signals can convey important weather information without the need for radio communication, especially useful in areas where visibility may be limited.

Understanding these visual signals is crucial for maritime safety, as they provide immediate warnings that can help prevent accidents at sea. Sailors should be trained to recognize these signals so they can act promptly when they observe them.