Question 32Safety & Environmental - 1st Asst/Chief

70% to pass

Among other restrictions, an oil tanker may not discharge an oily mixture into the sea from a cargo tank, slop tank, or cargo pump room bilge unless the vessel is _______________.

Adischarging at an instantaneous rate of oil content not exceeding 30 liters per nautical mile
Bis within "Special Areas" defined in Regulation 1
Cof Annex I to MARPOL 73/78
Dat anchor or stopped
AI Explanation

The correct answer is D) at anchor or stopped. This is because under Annex I of MARPOL 73/78, the International Convention for the Prevention of Pollution from Ships, oil tankers are generally prohibited from discharging any oily mixture from cargo tanks, slop tanks, or cargo pump room bilges into the sea, unless the ship is at anchor or stopped. The regulations only allow for limited discharges meeting strict oil content and distance from land requirements when the ship is underway. The other options are incorrect because they either describe specific discharge rate limits (A), reference special areas defined in MARPOL (B), or do not accurately reflect the general prohibition on discharges from cargo tanks, slop tanks, and cargo pump room bilges (C).

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Official Resources
46 CFR Safety Equipment USCG Environmental Standards USCG National Maritime Center
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