Navigation lightsQuestion 207 of 566

How wide is the arc of a sternlight?

  1. 135 degrees
  2. 112.5 degrees
  3. 225 degrees
  4. 360 degrees
Show answer

Correct answer: 135 degrees

A sternlight is a white light that shows 67.5 degrees to each side of right aft.

Source: Safe Boating Guide (TP 511E, 2026), Navigation lights, page 28

All questionsPractice the topic "Navigation lights"

Questions last reviewed: 18 October 2026