United States Coast Guard Captains License Practice Exam

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What characteristic is true for a "special flashing light"?

  1. It may show through an arc of 180°

  2. It flashes at the rate of 120 flashes per minute

  3. It is optional below the Baton Rouge Highway Bridge

  4. All of the above

The correct answer is: It may show through an arc of 180°

A "special flashing light" is characterized by its ability to be visible through an arc of 180°, making it effective for signaling in a wide area. This characteristic aids in its purpose of providing clear, immediate information to other vessels or users in the navigable waters, helping improve safety and situational awareness. While the flashing rate and optional usage limitations are relevant considerations, they do not define the primary characteristic of the light itself. The visibility arc is fundamentally important as it ensures that the light can be seen from multiple angles, thereby serving its intended function without restriction, particularly in critical navigation areas. This makes the identification of a "special flashing light" clear, distinct, and functional in maritime operations.