A flashing light defined in COLREGS flashes at regular intervals of how many times per minute?

A flashing light defined in COLREGS flashes at regular intervals of how many times per minute?

• A. 60
• B. 120
• C. 180
• D. 240

Answer: (B)

In COLREGS, a flashing light is one that turns on briefly and then off for a regular, repeatable interval. The standard rate defined for a flashing light is 120 flashes per minute, which is two flashes every second. This specific tempo helps mariners recognize and distinguish flashing lights from other light characteristics like fixed, occulting, or isophase. So the reason this is the best answer is that 120 flashes per minute is the established tempo for a flashing light in the regulations. The other rates correspond to faster or slower rhythms that aren’t the official definition for a flashing light.

In COLREGS, a flashing light is one that turns on briefly and then off for a regular, repeatable interval. The standard rate defined for a flashing light is 120 flashes per minute, which is two flashes every second. This specific tempo helps mariners recognize and distinguish flashing lights from other light characteristics like fixed, occulting, or isophase.

So the reason this is the best answer is that 120 flashes per minute is the established tempo for a flashing light in the regulations. The other rates correspond to faster or slower rhythms that aren’t the official definition for a flashing light.