What is the required number of flashes for a standard flashing light?

The correct requirement for the number of flashes for a standard flashing light is 120 per minute. This specification is based on the International Association of Lighthouse Authorities (IALA) recommendations, which outline the standards for light signals used in maritime navigation.

A flashing light that operates at 120 flashes per minute is designed to be prominent and easily recognizable to mariners, allowing for clear communication of navigational information. The use of a consistent and standardized flashing frequency helps in distinguishing this light from other types, ensuring that vessels can effectively identify hazards or navigational aids during their voyages.

While options such as 60, 100, and 150 flashes per minute may represent other types of light signals, they do not fulfill the criteria for a standard flashing light as defined in international maritime regulations. Thus, knowing the specific requirement of 120 flashes is crucial for understanding and complying with navigational standards.