Which symbol represents a cold front on navigation charts?

A cold front is represented on navigation charts by a line with blue triangles. This symbol indicates that cooler air is moving in and displacing warmer air, which is a characteristic feature of cold fronts. The blue triangles point in the direction that the cold front is moving, helping sailors and navigators understand the weather changes that can affect their journey.

Knowing the symbol for a cold front is crucial for weather navigation, as these fronts can bring significant changes in temperature, wind, and precipitation. The ability to interpret these symbols accurately allows mariners to make informed decisions about route planning and safety on the water.