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USCG Exam Practice · Anchoring — types, scope, holding ground

A moored barge reduces the available navigable width of a channel to 75 meters. Under 33 CFR §83.30, what lighting is required at night?

  1. ANo special lighting is required because the barge is moored parallel to the bank
  2. BTwo unobstructed all-round white lights visible for at least 1 nautical mile✓ correct
  3. COne all-round white light visible for at least 2 nautical miles
  4. DThe same two-light arrangement as a vessel at anchor under §83.30(a)

Why B is correct

33 CFR §83.30(h)(ii) requires lighting for any barge that reduces available navigable channel width to less than 80 meters. §83.30(i) specifies two unobstructed all-round white lights visible for at least 1 nautical mile. The anchor light arrangement of §83.30(a) applies to vessels at anchor, not specifically to moored barges under this provision.

Cited:33 CFR §83.30(h)33 CFR §83.30(i)

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