USCG Exam Practice · Rule 30 — Anchored and Aground (lights)
Under the Inland Navigation Rules, which vessels at anchor are required to use working or equivalent lights to illuminate their decks?
- AAll vessels at anchor in a designated anchorage area
- BVessels of 50 meters or more in length
- CVessels of 100 meters or more in length✓ correct
- DVessels of 75 meters or more in length
Why C is correct
33 CFR §83.30(c) states that a vessel at anchor may use working or equivalent lights to illuminate her decks, but a vessel of 100 meters or more in length shall do so. The 50-meter and 75-meter thresholds are not cited in this provision.
Cited:33 CFR §83.30
Drill more Rule 30 — Anchored and Aground (lights) questions
Every CaptainsGround answer cites the rule it tests — verified, not guessed. Try a free 5-question drill, no sign-up.
More practice questions
- Under the Inland Navigation Rules, a vessel less than 50 meters in length when at ancho…
- A vessel of 110 meters in length is at anchor at night. In addition to the lights presc…
- Under the Inland Navigation Rules, a vessel at anchor that is 75 meters in length shall…
- Under the Inland Navigation Rules, a vessel less than 50 meters in length that is at an…
- Under Inland Rule 30, a moored barge that reduces the available navigable width of a ch…
- Under the Inland Navigation Rules, a pilot vessel engaged on pilotage duty is at anchor…