🔍 Key Concepts

• Navigation Rules, Rule 21 – Definitions of lights (especially towing light, sternlight, and special flashing light) • The required color and arc of visibility for a sternlight versus sidelights • Difference between a steady light and a flashing/special flashing light in the Rules

💭 Think About

• First, look up how the Rules define a towing light and see which other light it is required to be "the same as" except for color. • Compare the specified arc of visibility for a towing light with the arcs for sidelights (112.5°), masthead lights (225°), and sternlights (135°). Which range matches a towing light? • Check the definition of a special flashing light and note its flash rate and color. Does a towing light have the same flash rate and behavior, or is it different?

✅ Before You Answer

• Verify in Rule 21 that a towing light is defined by both its color and its relation to another specific type of light. • Confirm the arc in degrees for that related light and see if it matches the 180°–225° range stated in one of the choices. • Check the flash rate (flashes per minute) and color for a special flashing light and decide whether a towing light behaves like that or like a steady sternlight.