Complete study guide for MARPOL Annex I, the oily water separator 15 ppm rule, Oil Record Book requirements, FWPCA discharge prohibitions, spill reporting, SOPEP, vessel response plans, and MARPOL Annex V garbage rules.
Oil pollution prevention at sea is governed by an interlocking set of international conventions and domestic statutes. Understanding the hierarchy of these laws is the first step toward mastering this topic for the USCG captain license exam — and for sound environmental seamanship.
The International Convention for the Prevention of Pollution from Ships, known as MARPOL 73/78, is the primary international instrument regulating vessel-source pollution. MARPOL was adopted by the International Maritime Organization (IMO) in 1973 and significantly strengthened by the 1978 Protocol (hence the combined designation 73/78). It entered into force on October 2, 1983.
MARPOL is organized into six Annexes, each covering a distinct category of pollution:
The USCG captain license exam focuses primarily on Annex I (oil) and Annex V (garbage). Annex IV (sewage) is covered in separate pollution modules. Annexes II, III, and VI appear in endorsement exams for larger commercial vessels.
The United States implements MARPOL through the Act to Prevent Pollution from Ships (APPS), 33 U.S.C. 1901 et seq. APPS gives the USCG enforcement authority over MARPOL violations in U.S. waters and over U.S.-flag vessels worldwide. Key provisions:
Enacted in the wake of the Exxon Valdez disaster, the Oil Pollution Act of 1990 (OPA 90) is the cornerstone of U.S. oil spill response and liability law. OPA 90 does not replace MARPOL or APPS — it operates alongside them, adding layers of civil liability and spill response requirements. Key OPA 90 provisions tested on the exam:
The Federal Water Pollution Control Act, commonly known as the Clean Water Act (CWA), is the primary U.S. domestic statute prohibiting oil and hazardous substance discharges into navigable waters. Section 311 of the CWA is the key provision for vessel operators.
Section 311 of the Clean Water Act prohibits the discharge of oil or hazardous substances into or upon the navigable waters of the United States, the adjoining shoreline, or the Exclusive Economic Zone in harmful quantities. A discharge is in a "harmful quantity" if it:
The sheen standard is the practical test for most small vessel operators: if the discharge produces any visible rainbow or silvery sheen on the water surface, it meets the threshold for reporting and prohibition. Even a tablespoon of motor oil can create a visible sheen over a surprisingly large area of water.
Both the Clean Water Act implementing regulations and APPS require that vessels display pollution warning placards. The requirements differ by vessel size and type:
| Vessel Size / Type | Required Placard(s) | Placement |
|---|---|---|
| All vessels 26 ft and longer | MARPOL oil placard (5x8 inches min) — "Discharge of Oil Prohibited" | Machinery space or bilge pump area |
| Vessels 40 ft+ with installed toilet | Sewage placard in addition to oil placard | Toilet compartment |
| Vessels 26 ft+ with a galley | MARPOL Annex V garbage placard | Galley, mess deck, or deck — conspicuous location |
| Vessels 400 GT or more | All applicable MARPOL placards + Garbage Management Plan | Throughout vessel — per MARPOL requirements |
The USCG exam frequently tests knowledge of when an oil discharge becomes reportable. The answer is always: any visible sheen. You do not need to calculate a quantity. You do not need to exceed a threshold number of gallons. If you can see it on the water, it must be reported immediately to the National Response Center at 800-424-8802. This rule applies even in deep ocean waters far from shore.
MARPOL Annex I establishes a zone-based system for controlling oil discharges. The zones are defined by distance from the nearest land, with stricter controls closer to shore and in specially designated areas. Exam candidates must memorize these zones and the associated discharge criteria precisely — this is among the most frequently tested topics.
| Zone | Discharge Rule | Vessels Covered |
|---|---|---|
| Within 3 nm of U.S. baseline | Zero discharge — no oily water of any concentration permitted | All vessels |
| 3 to 12 nm from shore | Discharge allowed below 15 ppm with approved OWS — vessels under 400 GT | Vessels under 400 GT |
| Beyond 12 nm from shore | Discharge allowed below 15 ppm with approved OWS, oil content monitor, vessel underway, no visible sheen | All vessels including 400 GT+ |
| Special Areas (Baltic, Black Sea, Red Sea, Gulf Area, Antarctic) | Zero discharge — no oily water discharge permitted in any quantity | All vessels in special areas |
MARPOL Annex I uses two primary distance markers relative to the nearest land: 12 nautical miles and 200 nautical miles (the EEZ boundary). These are distinct from the 3 nm U.S.-specific coastal zone set by APPS implementing regulations. Here is how they interrelate:
0 to 3 nm (U.S. territorial baseline)
No oil discharge whatsoever under U.S. law. Even water that meets the 15 ppm standard cannot be lawfully discharged within 3 nm under APPS implementing regulations for U.S. navigable waters. This is stricter than baseline MARPOL requirements and applies to all vessels in U.S. waters.
3 to 12 nm (Territorial Sea)
Vessels under 400 GT may discharge machinery space bilge water if it meets the 15 ppm standard through an approved OWS, the vessel is underway, and no visible sheen results. Vessels 400 GT and over must comply with the 12 nm threshold instead.
Beyond 12 nm
Vessels of 400 GT or more may discharge machinery space bilge water at or below 15 ppm using an approved OWS with operational oil content monitor, provided the vessel is underway and there is no visible sheen. The 200 nm EEZ is the outer limit of U.S. enforcement jurisdiction over foreign vessels.
MARPOL Special Areas — Zero Discharge Anywhere
In MARPOL Special Areas, no overboard discharge of oily water or oil residues from machinery spaces is permitted at any distance from land. Current MARPOL Annex I Special Areas include: the Baltic Sea, Black Sea, Red Sea, Gulfs Area (Persian Gulf / Gulf of Oman), Gulf of Aden, Antarctic Area, Northwest European Waters, Oman Area of the Arabian Sea, and the Southern South African Waters. These areas are essentially oil-discharge-free zones.
MARPOL Annex I applies to all ships regardless of flag state when operating in waters covered by the convention. Key compliance thresholds:
The oily water separator is the primary mechanical means by which vessels comply with MARPOL Annex I. Understanding how it works and the conditions under which it may be used is essential both for exam success and for responsible vessel operation.
An oily water separator uses gravity separation, coalescing media, and sometimes chemical treatment to remove suspended oil droplets from bilge water. The process occurs in stages:
| Requirement | Detail |
|---|---|
| Oil content limit | Must maintain output below 15 ppm at all times during discharge |
| Oil content monitor | Automatic monitoring device with alarm at 15 ppm; auto-shutdown above threshold |
| Vessel status | Vessel must be underway (making way) — not anchored, moored, or drifting |
| No visible sheen | Discharge must not produce visible oil slick, sheen, or discoloration on the water |
| ORB entry | Every OWS operation must be recorded in the Oil Record Book before discharge |
| MARPOL placard | Discharge of Oil Prohibited placard required in machinery space — 5x8 inches minimum |
| Location requirement | Beyond applicable distance limit from shore based on vessel GT |
| Equipment condition | OWS must be properly maintained; tampering or bypass is a criminal offense |
A "magic pipe" is any hose, fitting, or bypass device that diverts oily bilge water around the OWS and directly overboard, circumventing the treatment process. The term is used by federal prosecutors in criminal cases against vessel operators and crew. Magic pipe cases routinely result in:
The USCG and Department of Justice actively investigate these cases, often using whistleblower tips from crew members who report violations to U.S. authorities when the vessel calls at a U.S. port. The False Claims Act provides significant financial incentives for crew to report, and many prosecutions begin exactly this way.
The oil residue collected by the OWS (sludge) cannot itself be discharged overboard — it must be:
Every transfer and disposal of sludge must be recorded in the Oil Record Book with the date, quantity, method of disposal, and position. Failure to record sludge disposal is itself a MARPOL violation even if the disposal method was legal.
The Oil Record Book is the official vessel log required by MARPOL Annex I to document every oil handling, transfer, discharge, and disposal operation involving machinery space bilge water and, for tankers, cargo and ballast operations. Accurate ORB maintenance is not optional — it is a legal requirement, and falsification is a federal crime.
Under MARPOL Annex I Regulation 17 (as amended), the Oil Record Book is required on:
The ORB must be kept on board for three years after the last entry, and must be produced for inspection by any authorized USCG officer or port state control officer on demand. The master must countersign the ORB at the completion of each page.
Part I records all oil-related operations in the machinery space (engine room). Each category of operation has a designated code that must be used in the ORB:
| Code | Operation to Be Recorded |
|---|---|
| A | Ballasting or cleaning of fuel oil tanks |
| B | Discharge of dirty ballast or cleaning water from fuel oil tanks |
| C | Disposal of oily residues (sludge) |
| D | Non-automatic overboard discharge or disposal otherwise of bilge water in machinery spaces |
| E | Automatic discharge or disposal otherwise of bilge water in machinery spaces |
| F | Condition of oil discharge monitoring and control system |
| G | Accidental or other exceptional discharges of oil |
| H | Bunkering of fuel or bulk lubricating oil |
| I | Additional operational procedures and general remarks |
Part II is maintained only on oil tankers of 150 GT or more. It records every cargo and ballast operation with potential for oil pollution:
| Code | Operation to Be Recorded |
|---|---|
| A | Loading of oil cargo |
| B | Internal transfer of oil cargo during voyage |
| C | Unloading of oil cargo |
| D | Ballasting of cargo tanks and dedicated clean ballast tanks (CBT) |
| E | Cleaning of cargo tanks including crude oil washing |
| F | Discharge of dirty ballast |
| G | Discharge of water from slop tanks |
| H | Disposal of residues (slops) that cannot be pumped overboard |
| I | Discharge of clean ballast contained in cargo tanks |
| J | Discharge overboard, disposal otherwise or transfer to a slop tank of residues and oily mixtures |
| K | Ballasting of segregated ballast tanks (SBT) |
Every ORB entry must include specific information to be valid:
Common Exam Trap
The exam may ask whether it is a violation to have no entry for a bilge pumping operation. The answer is yes — every bilge water operation, whether discharged overboard or transferred to a holding tank, must be recorded. The absence of entries when operations have occurred is itself a violation and evidence of falsification.
The overboard discharge rules for oily water are among the most tested topics on the USCG captain license exam. The rules depend on the vessel size, distance from shore, vessel status, and the existence of any MARPOL Special Area designations.
For a machinery space bilge water discharge to be lawful under MARPOL Annex I and APPS, ALL of the following conditions must be met simultaneously:
MARPOL Annex I requires that any OWS discharge occur only while the ship is "proceeding en route." This means the ship must be making way through the water under its own power toward a destination. Anchoring briefly, heaving to, or drifting while the OWS operates would violate this requirement. The rationale: a moving vessel disperses the effluent more widely, reducing local concentration.
The exam sometimes presents scenarios where a vessel is stopped for engine repairs while operating the OWS. This is prohibited — the vessel is not proceeding en route. Similarly, operating the OWS while at anchor in a remote anchorage beyond 12 nm would still violate the underway requirement, even if the ppm reading is below 15.
The Shipboard Oil Pollution Emergency Plan is a vessel-specific emergency response document required by MARPOL Annex I Regulation 37. The SOPEP is the shipboard equivalent of a fire emergency plan — it tells the crew exactly what to do when an oil spill occurs or threatens to occur, both within the vessel and between the vessel and shore-based responders.
Oil Tankers
All oil tankers of 150 GT or more must carry an approved SOPEP. Given that tankers carry oil as cargo, the emergency planning obligation applies at a lower size threshold reflecting the greater risk.
Other Ships
All ships (non-tankers) of 400 GT or more must carry an approved SOPEP. This covers cargo vessels, passenger ships, fishing vessels, and other commercial vessels of significant size.
IMO Resolution MEPC.54(32) establishes the minimum content requirements for a SOPEP. Every compliant SOPEP must contain:
The SOPEP must be approved by or on behalf of the flag state Administration. For U.S.-flag vessels, the USCG NMC (National Maritime Center) approves the SOPEP. For foreign-flag vessels calling at U.S. ports, the flag state classification society typically approves the plan.
Port state control officers routinely check that the SOPEP is current, flag-state approved, accessible to crew, and that crew have been drilled on its procedures. A SOPEP drill must be conducted periodically — typically at intervals not exceeding three months — and the drills must be recorded in the vessel deck log.
The Vessel Response Plan is a U.S.-domestic requirement under OPA 90, administered by the USCG. Unlike the SOPEP (which is an MARPOL/international requirement), the VRP is purely a U.S. law requirement. The two plans are complementary and often cross-referenced in a vessel's pollution response documentation.
Under 33 CFR Part 155, a Vessel Response Plan is required for:
Qualified Individual (QI)
A U.S.-based person or 24/7 duty station with full authority to commit vessel owner resources to response. The QI must be reachable at all times when the vessel is in U.S. waters.
Worst-Case Discharge Scenario
A calculated maximum discharge scenario — for tank vessels, typically the largest tank plus 25% of remaining cargo. The plan must demonstrate the ability to respond to this scenario.
Pre-contracted OSRO
An Oil Spill Response Organization (OSRO) pre-contracted to provide response resources appropriate to the WCD scenario — boom, skimmers, recovery vessels, dispersants where authorized.
Notification Procedures
Step-by-step notification procedures: when to call NRC, how to notify USCG Captain of the Port (COTP), company notification chain, flag state (for foreign vessels), and media contacts.
Response Resources Inventory
Inventory of onboard equipment — boom, skimmers, sorbents, dispersant (if pre-authorized), and any other containment equipment carried aboard.
Training and Drill Schedule
Training requirements for crew and management, and drill schedules including tabletop exercises and equipment deployment drills.
VRPs must be submitted to and approved by the USCG COTP or Marine Safety Center before the vessel operates in U.S. waters. The plan must be reviewed and updated annually, and whenever there are changes to the vessel, ownership, QI, or contracted OSRO. A vessel operating without an approved VRP when one is required may be denied entry to port and faces civil penalties up to $40,000 per day of violation.
The USCG Electronic VRP (eVRP) system allows online submission and management of VRPs. The USCG maintains a public database of approved VRPs, which port state control officers can verify before a vessel arrives in port.
The International Convention on Oil Pollution Preparedness, Response and Co-operation (OPRC 1990) is the international framework for preparedness, notification, and cooperative response to significant oil spills. While MARPOL focuses on preventing discharges, OPRC establishes the international system for responding to spills that do occur.
National Response Systems
Each signatory state must establish a national system for preparedness and response to oil spills. For the United States, this is implemented through the National Response System (NRS) under the National Oil and Hazardous Substances Pollution Contingency Plan (NCP) — the so-called National Contingency Plan.
Ship Reporting Obligations
Ships must report oil spills or observed pollution to the nearest coastal state authority. This requirement aligns with MARPOL Annex I Regulation 22 and applies regardless of whether the ship caused the spill or merely observed it. In U.S. waters, reports go to the USCG and the NRC.
Port Reception Facilities
OPRC requires signatory states to ensure adequate port reception facilities for oily wastes and residues, so that ships have a lawful and practical means to offload bilge sludge, slop tank contents, and other oily wastes collected during voyages. Inadequate reception facilities are sometimes cited as a contributing factor in illegal discharges.
OPRC-HNS Protocol
The 2000 OPRC-HNS Protocol extends the OPRC framework to hazardous and noxious substances (HNS), not just oil. This protocol covers bulk chemical tankers and vessels carrying HNS in packaged form. The United States is a party to the original OPRC convention; the OPRC-HNS Protocol has had more limited ratification.
The U.S. implements OPRC through the National Response System, which operates under the National Contingency Plan (40 CFR Part 300). The hierarchy of response authority in a U.S. oil spill is:
National Response Center (NRC)
24-hour oil and chemical spill reporting — memorize this number
The NRC is the sole federal point of contact for initial notification of oil discharges and releases of hazardous substances. Staffed 24 hours a day, 365 days a year by the USCG, the NRC relays reports to the appropriate On-Scene Coordinator and other agencies. Calling the NRC does not trigger automatic liability — failure to call does trigger criminal penalties.
Multiple statutes require immediate notification of the NRC:
Clean Water Act Section 311
Report immediately whenever oil is discharged into or upon navigable waters in a quantity that causes a visible sheen or discoloration. There is no minimum quantity threshold for sheen-producing discharges — any visible sheen triggers the reporting obligation.
APPS / MARPOL Annex I Regulation 22
Every discharge of oil or oily mixtures must be reported to the nearest coastal state. For U.S. waters, this means calling the NRC and the USCG COTP. The report must include vessel name, flag, position, nature and quantity of oil discharged, and actions being taken.
OPA 90
Under OPA 90, the responsible party must immediately notify the NRC of any discharge of oil into or upon the navigable waters or the EEZ. OPA 90 also requires notification of the state agency for the affected state, and of any potentially affected state downstream.
When calling the NRC, be prepared to provide:
Failure to report an oil spill to the NRC is not merely a regulatory infraction — it is a criminal offense under multiple statutes:
It is a fundamental principle of environmental seamanship: when in doubt, report. The duty to call the NRC is not diminished by uncertainty about whether the discharge is reportable. Voluntary reporting is always the correct action — it demonstrates good faith, can mitigate penalties, and triggers the government response resources that may be needed.
The penalty structure for oil pollution violations involves multiple statutes with overlapping civil and criminal provisions. Federal prosecutors have aggressively pursued these cases, and real-world penalty amounts have far exceeded statutory minimums in major cases.
| Offense | Civil Penalty | Criminal Fine | Imprisonment |
|---|---|---|---|
| Civil violation of APPS (MARPOL discharge) | Up to $25,000 per day | N/A for civil | None (civil) |
| Negligent criminal APPS violation | N/A | Up to $100,000 per day per count | Up to 1 year per count |
| Knowing APPS violation | N/A | Up to $250,000 per day per count | Up to 6 years per count |
| Falsifying Oil Record Book (magic pipe) | N/A | Up to $250,000 per count (company millions) | Up to 6 years per count |
| Failure to report spill to NRC | Up to $25,000 per day | Up to $250,000 / fine; possible imprisonment | Up to 5 years (knowing failure) |
| OPA 90 oil spill civil liability | Strict liability for removal costs + damages | N/A (strict civil liability) | N/A |
| Failure to maintain VRP (tank vessels) | Up to $40,000 per day | N/A | None |
Federal prosecutors have brought numerous cases against shipping companies for illegal bilge water discharges. These cases share a common pattern: crew discover that the chief engineer has been using a bypass hose (magic pipe) to discharge untreated oily bilge water directly overboard while also making false entries in the ORB to show proper OWS operation. When the vessel calls at a U.S. port, crew members report the violations to USCG investigators. Investigations include examining the ORB against actual bilge pump logs, fuel consumption records, and physical evidence of bypass equipment.
Companies convicted of APPS violations have paid fines ranging from several hundred thousand dollars to tens of millions. Chief engineers in major cases have received sentences of one to three years in federal prison. Companies are often placed on probation with an independent court-appointed monitor reviewing environmental compliance for several years post-conviction.
MARPOL Annex V governs the discharge of garbage from ships. The 2013 amendments substantially tightened the requirements, adding an absolute prohibition on all discharges in Special Areas and restricting food waste discharges. The plastic prohibition has been in place since the original Annex V and remains the most absolute rule in the entire pollution prevention framework.
| Type of Garbage | Minimum Distance | Notes |
|---|---|---|
| Plastics of any kind | NEVER — prohibited everywhere at sea | Absolute prohibition; no exception exists |
| Incinerator ash containing plastic | NEVER — prohibited everywhere at sea | Shares plastic prohibition; cannot be ash-dumped at sea |
| Operational waste (non-plastic) | 25+ nm from land | Cargo residues not mixed with plastic; dunnage, lining, packing |
| Food waste — not ground/comminuted | 12+ nm from land | Whole or large pieces of food waste |
| Food waste — ground to less than 25 mm | 3+ nm from land | Must pass through a grinder or comminuter |
| Paper, rags, glass, metal, crockery (non-special area) | 12+ nm from land | En route to a port for disposal is preferable |
| Cargo residues (non-harmful to environment) | 12+ nm — consult specific rules | Cannot be contaminated with plastic materials |
In Annex V Special Areas, only food waste ground to less than 25 mm may be discharged, and only when beyond 12 nm from land. All other garbage must be retained aboard for port disposal. The current Annex V Special Areas include:
Vessels 100 GT or more, and vessels certified to carry 15 or more persons, must carry a written Garbage Management Plan (GMP). The GMP must describe:
Vessels 400 GT or more, and vessels certified to carry 15 or more persons, must maintain a Garbage Record Book. Every garbage discharge or incineration operation must be recorded, including date, position (lat/lon), type of garbage, estimated volume, and method of disposal. The GRB must be retained for two years after the last entry.
Port state control officers routinely inspect the GRB alongside the ORB. Gaps in the GRB that do not correspond to port calls (where garbage would be offloaded) raise immediate questions about whether garbage was illegally discharged at sea.
Memorize 800-424-8802
The NRC number appears directly on exam questions. Know it cold. Any oil discharge causing a sheen requires an immediate call to this number.
15 ppm — not 15 gallons or 15 liters
The OWS limit is 15 parts per million by concentration, not a volume. This is a continuous concentration limit maintained by the oil content monitor.
12 nm vs. 3 nm — know both thresholds
Vessels 400 GT or more: 12 nm minimum distance. Smaller vessels with OWS: 3 nm minimum. Exam questions frequently specify vessel GT to determine which rule applies.
Vessel must be underway
No OWS discharge while anchored or moored — even beyond 12 nm. If a question mentions the vessel is at anchor, discharge is prohibited regardless of ppm reading.
Plastics are always prohibited
No distance makes plastic discharge legal. Even 500 nm from shore, throwing a plastic bag overboard violates MARPOL Annex V. No exception exists.
ORB must be signed by officer in charge AND master
Officer in charge signs each entry. Master countersigns completed pages. Both signatures are required for a complete, legally valid ORB.
SOPEP vs. VRP
SOPEP = international (MARPOL) requirement, flag-state approved. VRP = U.S. domestic (OPA 90) requirement, USCG approved. Large U.S. vessels need both.
ORB retention period is 3 years
The Oil Record Book must be kept aboard for 3 years after the last entry. The Garbage Record Book retention is 2 years. These numbers differ — know both.
Trap 1: "No sheen" does not equal "no problem"
A discharge of oily water that is below 15 ppm AND produces no sheen but occurs within 12 nm is still illegal for a 400 GT vessel. Distance is a separate requirement from oil content.
Trap 2: The "600 nm offshore" distractor
Some questions imply that being very far offshore makes any discharge legal. MARPOL Special Areas still apply regardless of distance from land. In a Special Area, even 600 nm offshore, no oily water may be discharged.
Trap 3: ORB required for 400 GT — not 26 feet
The MARPOL placard is required for vessels 26 feet and over. The ORB is required at 400 GT. Exam questions sometimes swap these thresholds. The placard threshold is smaller (26 ft); the ORB threshold is larger (400 GT).
Trap 4: Food waste distance varies by treatment
Ground food waste (less than 25 mm): 3 nm. Unground food waste: 12 nm. This distinction appears on the exam. A comminuter or grinder reduces the required distance from 12 nm to 3 nm — but never to zero.
15 ppm
OWS maximum discharge concentration
12 nm
Minimum distance for 400 GT+ vessels to use OWS
3 nm
No discharge zone for all vessels (U.S.)
25 mm
Maximum particle size for "ground" food waste
400 GT
Threshold for ORB Part I requirement
150 GT
Tanker threshold for ORB Part II and SOPEP
3 years
ORB retention period after last entry
2 years
Garbage Record Book retention period
800-424-8802
NRC spill reporting hotline
26 ft
MARPOL placard requirement threshold
$25,000/day
Civil penalty per violation of APPS
5 × 8 inches
Minimum size of MARPOL oil placard
The 15 ppm rule limits the oil content of bilge water discharged overboard to no more than 15 parts per million. Beyond 12 nautical miles from shore, machinery space bilge water from vessels 400 GT or more may be discharged only if it passes through an approved oily water separator maintaining output below 15 ppm, an oil content monitor with automatic shutoff is in use, the vessel is underway (not at anchor or moored), and the discharge does not cause a visible sheen. Smaller vessels operating more than 3 nm offshore may discharge bilge water below 15 ppm under similar conditions. Within 3 nm of the U.S. baseline, no discharge of any oily water is permitted regardless of oil content.
The Oil Record Book Part I (machinery space) must record every oil transfer, ballasting or cleaning of fuel oil tanks, disposal of oily residues (sludge), overboard discharge or non-discharge through OWS, bilge water accumulation and transfer to bilge holding tanks, and accidental or exceptional discharges of oil. Each entry must state the date, the ship position (latitude and longitude) at the time of the operation, quantity involved, and must be signed by the officer in charge. The master must countersign completed pages. The ORB must be retained for three years after the last entry and be available for inspection by port state control officers at any time.
Under the Federal Water Pollution Control Act (Clean Water Act Section 311) and the Act to Prevent Pollution from Ships, the person in charge of a vessel must immediately notify the National Response Center at 800-424-8802 whenever oil is discharged into or upon the navigable waters of the United States, the adjoining shoreline, or the Exclusive Economic Zone in a quantity that causes a visible sheen or discoloration of the water surface or adjoining shoreline, or that violates applicable water quality standards. Notification must be immediate — there is no grace period. Failure to report is a felony under APPS, punishable by fines up to $250,000 and up to 5 years imprisonment for intentional violations.
A SOPEP (Shipboard Oil Pollution Emergency Plan) is a written plan that describes the procedures a vessel crew must follow when an oil spill occurs or threatens to occur. MARPOL Annex I Regulation 37 requires a SOPEP on every oil tanker of 150 GT or more and every other ship of 400 GT or more. The plan must be approved by the vessel flag state administration and include: reporting procedures to authorities, a list of authorities to contact, action steps to contain and clean up the spill aboard, and coordination procedures with shore-side response organizations. The SOPEP must be kept aboard and available for port state control inspection.
Under MARPOL Annex V (implemented in the U.S. by the Act to Prevent Pollution from Ships), plastics of any kind — including synthetic ropes, synthetic fishing nets, plastic garbage bags, plastic packaging materials, and incinerator ash from plastic products — are absolutely prohibited from discharge at sea at any location, at any distance from shore. There is no exception. Operational waste contaminated with plastics shares the same prohibition. Food waste, paper, rags, glass, metal, and similar non-plastic garbage can be discharged beyond specified distances from land, but nothing made of or containing plastic may ever be thrown overboard.
MARPOL Annex I governs the prevention of oil pollution from ships, establishing rules for machinery space bilge water discharges (15 ppm limit), cargo tank washings, and ballast water from oil tankers. It requires Oil Record Books, oily water separators, oil content monitors, and SOPEP plans. MARPOL Annex V governs the prevention of garbage pollution from ships, establishing distance-based rules for disposal of food waste, paper, rags, glass, and metal, while absolutely prohibiting all plastic disposal at sea. Annex V requires vessels to maintain a Garbage Management Plan and a Garbage Record Book. Both Annexes are incorporated into U.S. law by the Act to Prevent Pollution from Ships (APPS), 33 U.S.C. 1901 et seq.
Civil penalties under the Act to Prevent Pollution from Ships (APPS) can reach $25,000 per day of violation. Criminal penalties for negligent violations include fines up to $100,000 per day and up to 1 year imprisonment. Knowing violations carry fines up to $250,000 and up to 6 years imprisonment per count. For violations involving falsification of the Oil Record Book (the so-called 'magic pipe' cases), courts have imposed fines in the millions against shipping companies and imprisonment for chief engineers. A vessel may also be detained by the Coast Guard until compliance is demonstrated, and port state control can deny entry to a vessel with a history of violations.
A Vessel Response Plan (VRP) is required under OPA 90 (Oil Pollution Act of 1990) for any vessel using the waters of the United States that carries oil as cargo in bulk (tank vessels) or any other vessel of 400 GT or more that uses the waters of the EEZ. The VRP must describe how the vessel will respond to a worst-case discharge scenario, name a qualified individual (QI) who has full authority to direct response actions, identify pre-contracted spill response organizations (OSROs), and outline notification procedures. VRPs must be submitted to and approved by the USCG before the vessel operates in U.S. waters.
Marine Pollution Overview
MARPOL Annexes I/IV/V, MSDs, sewage, and garbage placards
Marine Environmental Protection
Comprehensive environmental seamanship for licensed captains
Deck General & Safety
Full OUPV exam Section 2 study guide
Vessel Inspection
Port state control, USCG inspections, and documentation
Emergency Procedures
Man overboard, fire, flooding, and pollution response
Maritime Law
Federal vessel regulations, liability, and responsibilities
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