USCG Exam Practice · Rule 27 — NUC and RAM (lights)
A floating dredge pipeline crosses a navigable channel. What is the maximum permitted spacing between the flashing yellow lights marking the pipeline in that channel?
- A5 meters
- B10 meters✓ correct
- C15 meters
- D3.5 meters
Why B is correct
33 CFR §83.27(d)(iv)(1)(F) states that where the pipeline crosses a navigable channel, the flashing yellow lights must be not more than 10 meters apart. Outside a navigable channel, the lights need only be sufficient in number to clearly show the pipeline's length and course, with no specific maximum spacing stated.
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