How is the intensity of a flashing light defined?

The intensity of a flashing light is defined by its flashing rate, which indicates how often the light turns on and off within a given time frame. A flashing light that operates at a rate of 120 flashes or more per minute is classified as having high intensity. This categorization is crucial for distinguishing between different types of navigational aids and signaling devices.

In maritime navigation, lights are used to convey specific information to other vessels. A flashing light serves as a signal that can be easily recognized by mariners, and the frequency of the flashes plays a critical role in identifying the light's purpose and the type of vessel or situation it represents. Lights flashing at 120 times or more per minute are often associated with significant navigational aids, such as those used in more hazardous areas or to mark specific obstructions.

While other options refer to lower flashing rates or steady lights, they do not meet the criteria for defining a high-intensity flashing light. Therefore, the understanding that a high-intensity light is characterized by a flash frequency of 120 times or more is essential for navigation safety and for recognizing proper signaling techniques at sea.