What is the night marker for a gale warning?

A gale warning is indicated at night by the use of two red lights. This particular display is a standardized maritime signal that aims to alert vessels in the vicinity of potentially hazardous conditions due to high winds. By signaling with two red lights, mariners are effectively communicated to that they should take necessary precautions, as this warning signifies the expectation of sustained wind speeds between 34 to 40 knots (39 to 46 mph). The use of red as the color for this warning also aligns with maritime safety standards, as red is universally understood to signify danger or caution in navigational contexts.

In contrast, other options do not represent the night marker for a gale warning. The red flag with a black square, white over red, and red pennant may be used for different warnings or messages but do not convey the specific message of a gale warning at night. Thus, the correct indication of two red lights serves a vital role in ensuring that vessels are informed and can respond appropriately to impending gale conditions.