MARPOL Annex V: Garbage from Ships

Background

The shipboard garbage challenge

Shipboard garbage presents specific environmental challenges:

• Plastic persistence: plastic discharged at sea persists for decades to centuries, accumulating in marine ecosystems and breaking down to microplastics.
• Wildlife impact: marine mammals, birds, fish and turtles ingest plastic with often fatal consequences; entanglement in fishing gear and packaging strapping is a recognised cause of marine mammal mortality.
• Beach pollution: ship-source garbage washes ashore on coasts, with cleanup costs borne by coastal states.
• Cumulative volume: aggregate garbage from the world fleet over decades has contributed substantially to ocean pollution.
• Visibility: garbage pollution is highly visible to the public, driving political and regulatory pressure.

The shipboard garbage volume has grown with the world fleet and with consumer-product packaging trends, requiring progressive tightening of MARPOL Annex V provisions.

Why Annex V is unique among MARPOL annexes

Annex V is unique among the MARPOL annexes in several ways:

• Most comprehensive Special Area regime: more Special Areas than any other MARPOL annex.
• Multiple discharge categories: the 11-category system is more granular than the binary or tertiary structures of other annexes.
• Plastics ban: a complete prohibition on plastic discharge globally, the most categorical pollution prohibition in MARPOL.
• Operational diversity: garbage from ship operations covers the full diversity of consumer and operational products that pass through shipboard life.
• Public attention: ocean plastic pollution receives more public attention than oil pollution or chemical pollution, driving stronger political pressure.

The combination of comprehensive coverage, public attention, and continuing emergence of new issues (microplastics, plastic pellets, e-waste) makes Annex V one of the most actively-amended MARPOL annexes.

Major amendment milestones

Annex V has been amended substantially several times:

• 1973: Annex V adoption alongside MARPOL.
• 31 December 1988: Annex V entered into force; foundational plastics discharge ban globally.
• 1990: Wider Caribbean Special Area designation.
• 1992-1995: Mediterranean, Baltic, Black Sea, Red Sea, Gulfs, North Sea Special Areas progressively designated.
• 1995: First Antarctic Special Area provisions.
• 2011 (Resolution MEPC.201(62)): substantial revision introducing the current 11-category system, entered into force 1 January 2013. This was the most comprehensive Annex V revision since 1988.
• 2013: Cooking oil discharge ban under the new categorisation.
• 2014: HME cargo residue provisions strengthened.
• 2017: E-waste category (Category J) added, Polar Code Part II-A integration.
• 2018 (Resolution MEPC.295(71)): Garbage Record Book split into Part I (general garbage) and Part II (cargo residues), with separate provisions for each.
• 2021: Further amendments addressing plastic pellet pollution discussions and regional Special Area expansion.
• Ongoing: amendments addressing emerging issues including biodegradable plastics, microplastics, and continued Special Area expansion proposals.

The amendment cycle reflects sustained political attention to marine plastic pollution and the recognition that earlier provisions were insufficient to address the issue.

Application

Ship types and sizes

Annex V applies to:

• All ships engaged on international voyages, including cargo ships of any size, passenger ships of any size, fishing vessels, government non-commercial vessels (with adaptations), pleasure craft.
• Fixed and floating platforms including offshore drilling rigs, FPSO units, accommodation platforms.
• Ships of less than 100 GT for the basic discharge prohibitions, though without the full Garbage Management Plan and Record Book requirements applicable to larger ships.

Garbage Management Plan and Record Book applicability

The Garbage Management Plan and Garbage Record Book are required on:

• Ships of 100 gross tonnage and above.
• Ships carrying 15 or more persons.
• Every fixed and floating platform regardless of size.

Smaller ships and platforms still must comply with the discharge prohibitions but with reduced documentation requirements.

Exemptions

Specific exemptions from Annex V:

• Discharge in case of emergency: necessary to secure the safety of a ship and those on board, or to save life at sea.
• Discharge resulting from accidental damage with reasonable precautions.
• Discharge of fishing gear from fishing vessels for the purpose of protection of marine resources or safety.
• Discharge for marine research purposes with appropriate authorisation.

The exemptions are narrowly construed and require detailed documentation of the circumstances.

The 11 garbage categories (Categories A-K)

Category A: Plastics

Plastics include all forms of synthetic polymer materials: bags, bottles, packaging, ropes, fishing nets, paint chips, microplastic particles, polymer-impregnated materials, and plastic-containing composite items.

Discharge regime: prohibited globally under all circumstances. Plastics must be retained on board and discharged to reception facilities.

The plastic ban is the foundational Annex V provision. Specific aspects:

• Definition breadth: includes anything containing plastic as a primary or substantial component, even if mixed with other materials.
• Operational implication: every plastic item entering the ship must leave via reception facility.
• Crew training: recognition of “what is plastic” is a routine training topic.
• Stowage and segregation: plastic typically segregated from other garbage for reception facility delivery.
• Microplastics: increasingly recognised as a specific concern beyond bulk plastic items.

Category B: Floating dunnage, lining and packaging materials

Floating dunnage includes wood dunnage, paper packaging, fibreboard, jute, sisal, and other naturally-floating materials used for cargo packaging or stowage.

Discharge regime:

• General areas: minimum 25 nautical miles from nearest land while in transit.
• Special Areas: discharge prohibited.

The 25 nautical miles minimum reflects the floating nature of these materials, which allows tide and current to deposit them on shore over longer distances than non-floating garbage.

Category C: Food wastes

Food wastes include all organic waste from galley operations: vegetable scraps, meat trimmings, dairy waste, fish offal, baked goods, beverages.

Discharge regime:

• General areas, comminuted to less than 25 mm: minimum 3 nautical miles from nearest land.
• General areas, uncomminuted: minimum 12 nautical miles from nearest land.
• Special Areas: minimum 12 nautical miles from nearest land.
• Polar waters: prohibited under Polar Code.

The comminution requirement reflects that smaller particles disperse more rapidly and have less environmental impact.

Category D: Cargo residues

Cargo residues are the residues of bulk cargo (typically a few percent of original cargo) remaining after discharge operations. The category covers cargo residues that are not harmful to the marine environment (HME).

Discharge regime:

• General areas: minimum 12 nautical miles from nearest land while in transit.
• Special Areas: discharge restricted; specific provisions vary.
• Polar waters: more restrictive provisions.

Common Category D cargo residues include grain dust, mineral dust, sand, salt, cement.

Category E: Cooking oil

Cooking oil includes used cooking oil from galleys: vegetable oils used for frying, oils removed from extractor hoods, fat traps from kitchen drains.

Discharge regime: prohibited globally since 2013.

The cooking oil ban was added because cooking oil discharge was previously allowed under generic operational waste provisions but recognised as a specific aquatic concern (oxygen depletion, animal entanglement in oil patches).

Category F: Incinerator ashes

Incinerator ashes are residues from on-board incineration of garbage and waste oil.

Discharge regime:

• General areas, in transit: minimum 12 nautical miles from nearest land.
• Special Areas: discharge prohibited.
• Polar waters: discharge prohibited.

Incinerator ashes may contain heavy metals (especially from electronic waste, painted materials, or treated wood) and concentrated organic residues, justifying restriction.

Category G: Operational wastes

Operational wastes include cleaning rags, deck sweepings, disposable wipes, soft furnishings, paint and coating wastes, used filters, used personal protective equipment, used absorbents.

Discharge regime: prohibited globally under most circumstances. Discharge permitted only in specific narrow exceptions (e.g., distance from nearest land in non-special areas for certain operational wastes that are not contaminated with HME or oil).

The operational waste category is the most operationally significant for cargo ships and is the principal driver of garbage reception facility demand.

Category H: Animal carcasses

Animal carcasses are typically encountered on livestock carriers, where transport mortality produces dead animals requiring disposal.

Discharge regime:

• In transit, in general areas, more than 100 nautical miles from nearest land: discharge permitted with specific procedures.
• Special Areas: discharge prohibited.
• Polar waters: discharge prohibited.

Specific procedures include weighting carcasses to ensure sinking, avoiding discharge in shallow waters, and discharging in groups to avoid creating localised attractant for sharks and other predators.

Category I: Fishing gear

Fishing gear includes nets, ropes, lines, traps, lobster pots, longlines, fish-aggregating devices.

Discharge regime: prohibited globally under all circumstances. Lost fishing gear is a special category, accidental loss must be reported and recovery attempted where practicable, but the loss itself is not a violation if the procedures are followed.

The fishing gear ban addresses ghost fishing (lost gear continues to catch fish indefinitely) and entanglement of marine wildlife.

Category J: E-waste

E-waste includes electronic equipment, batteries, fluorescent tubes, mercury-containing thermometers, and other items containing electronic components.

Discharge regime: prohibited globally since 2017.

E-waste contains heavy metals (lead, mercury, cadmium) and other persistent contaminants that make even small discharges environmentally damaging. The 2017 amendment addressing e-waste reflected the growing volume of electronic equipment on ships and the recognition that electronic waste required dedicated disposal infrastructure.

Category K: Cargo residues with HME (harmful to the marine environment)

Cargo residues with HME are residues of bulk cargoes that are classified as harmful to the marine environment under specific criteria. Common examples include:

• Mineral concentrates with heavy metal content (lead, zinc, copper concentrates).
• Coal: heavy metal and PAH content.
• Iron ore fines: heavy metal content.
• Certain agricultural cargoes: with pesticide residue.
• Fishmeal: with feed additive content.

Discharge regime: prohibited globally. Reception-only disposal.

The HME category was added to address the environmental impact of cargo residues that, while small in mass, can have substantial impact due to heavy metal or organic contaminant content.

Garbage Management Plan (GarMP)

Required content

Every ship of 100 GT and above or carrying 15 or more persons must have a Garbage Management Plan approved by the flag state. The plan must include:

• Procedures for collecting garbage: from each crew accommodation area, galley, machinery space, deck operations area.
• Procedures for processing garbage: comminution, compaction, incineration where fitted.
• Procedures for storing garbage: segregation by category, container labelling, storage location.
• Procedures for disposing of garbage: discharge under the regulatory regime (or reception facility delivery for prohibited discharge categories).
• Personnel responsibilities: identification of crew responsible for each step.
• Training programme: how the crew are familiarised with the plan.
• Garbage minimisation strategies: source reduction (e.g., reducing single-use plastics).
• Sample Garbage Record Book entries showing the format and required fields.

Plan implementation

GarMP implementation:

• Crew familiarisation: all crew at familiarisation training receive an introduction to the plan.
• Specific duty crew: designated cleaning crew receive detailed training.
• Periodic refresher training: at intervals.
• Plan updates: when ship configuration changes or when regulations change.
• Self-audit: by the operator’s safety management system.

The implementation is verified at PSC inspection through documentation review and crew interview.

Plan format and approval

The plan format follows IMO guidance (MEPC.1/Circ.834 and successors):

• Standard sections matching the regulatory expectation.
• Ship-specific detail about the ship’s garbage handling equipment and procedures.
• Annexes with detailed procedures, training materials, and forms.
• Flag state approval with annual or periodic re-approval.

Garbage Record Book

Part I: General garbage

The Garbage Record Book Part I records:

• Discharge to reception facility: date, time, location, garbage category, quantity, signature.
• Discharge at sea: date, time, position, ship’s speed, distance from land, garbage category, quantity, signature.
• Incineration of garbage: date, time, position, quantity incinerated, signature.
• Accidental loss or discharge: date, time, position, quantity, circumstances, action taken, signature.
• Comments: any operational notes or special circumstances.

Each entry must be signed by the responsible officer (typically the chief mate or chief engineer for the relevant garbage category).

Part II: Cargo residue-related discharges

Following 2018 amendments (Resolution MEPC.295(71)), a separate Garbage Record Book Part II records:

• Cargo residue discharge: specifically for HME and non-HME cargo residues.
• Hold cleaning operations: with recovery of residue to slop tank or other holding.
• Cargo washing water: discharge timing, method, residue handling.
• Reception facility transfer: of cargo residue waste.

The split into Parts I and II reflects the distinct regulatory regimes for general garbage versus cargo residue management.

Documentation retention

Garbage Record Books are:

• Retained on board for at least 2 years from the last entry.
• Available for PSC inspection on demand.
• Surrendered at port state inspection for verification of consistency.
• Used in casualty investigation when garbage-related issues are suspected.

The Garbage Record Book is one of the principal compliance documents and is one of the most-cited PSC inspection items.

Special Areas

Annex V has the most extensive Special Area regime of any MARPOL annex. Special Areas under Annex V have additional discharge restrictions and prohibitions:

Mediterranean Sea Special Area

Designated 1995 (entered into force 1995). Mediterranean is one of the most sensitive marine areas due to limited water exchange and concentration of marine biodiversity.

Baltic Sea Special Area

Designated 1995. The Baltic has been progressively given the most stringent Annex V provisions due to its semi-enclosed nature.

Black Sea Special Area

Designated 1995.

Red Sea Special Area

Designated 1995.

Gulfs Area Special Area

Designated 1995. Includes Persian Gulf, Gulf of Oman, and adjacent waters.

Wider Caribbean Special Area

Designated 1990 (the first MARPOL Annex V Special Area).

North Sea Special Area

Designated 1991.

Antarctic Area Special Area

Designated 1990, with progressively stricter provisions and full Polar Code Part II-A integration.

South African waters

Specific Annex V provisions for waters around southern South Africa.

Effects of Special Area designation

Special Area designation triggers:

• Stricter discharge categories: certain garbage categories that may be discharged elsewhere are prohibited in Special Areas.
• Stricter distance requirements: minimum distances from land are typically higher.
• Reception facility expectations: ports in Special Areas must provide adequate reception capacity.
• Enforcement priority: PSC inspections in Special Areas typically include detailed Annex V verification.

Reception facilities

Reception facility requirements

Annex V Regulation 8 requires ports to provide adequate garbage reception facilities. Each port must:

• Receive garbage from all categories that ships may bring ashore.
• Standardised connections for ship-side discharge.
• Cost reasonable to avoid discouraging use.
• Operating hours matching port operations.
• Disposal infrastructure with appropriate environmental controls.

Major port practices

Major port garbage reception practices:

• Multi-category reception: separate streams for plastics, food, paper, e-waste, hazardous garbage.
• Compactors and shredders: for volume reduction.
• Dedicated container lines for cruise ship reception (large volumes).
• Recycling integration: with municipal or industrial recycling streams.
• Hazardous waste channels for batteries, electronic waste, and HME residues.

Reception facility cost

Reception facility cost typically:

• Per cubic metre: typical rates 50 to 200 USD per cubic metre depending on category and port.
• Per ship call: in some ports as a flat fee.
• Premium for hazardous categories: e-waste, HME residue, contaminated waste.
• Volume-based discounts: for cruise ships with large volume.

The cost is typically passed through to cargo interests rather than absorbed by the ship.

Ship-side garbage handling equipment

Garbage room and segregation

Modern ships have a dedicated garbage room with:

• Multiple bins for category segregation (plastic, paper, food, metal, glass, e-waste, hazardous).
• Refrigerated storage for food waste on long voyages or hot climates.
• Compactors for volume reduction.
• Shredders for size reduction (including plastic if disposed via reception facility).
• Labelling with MARPOL-required pictograms.
• Ventilation with odour control.

Shipboard incinerators

Shipboard incinerators are used to reduce garbage volume and to dispose of certain categories. Requirements:

• Type approval under IMO Resolution MEPC.244(66) for new incinerators.
• Operating temperature: minimum 850 degrees Celsius for combustion chamber, 400 degrees Celsius for flue gas.
• Emission monitoring: oxygen, CO, particulates, SO2.
• Approved waste streams: garbage, oily sludge, sewage sludge.
• Prohibited waste streams: PCB-containing items, mercury-containing batteries, chemical wastes, refrigerants, plastic items containing halogens (PVC, etc.).

Incineration ash falls under Category F with the discharge restrictions noted above.

Garbage compactors

Garbage compactors reduce volume by 5 to 10 times, supporting longer voyage retention before reception facility delivery. Compactors:

• Hydraulic operation with crew controls.
• Bin-by-bin operation for category segregation.
• Output volume typically 60 to 80 percent reduction.
• Maintenance: hydraulic system, blade sharpening, bin replacement.

Recycling and reuse

Some ships practice voluntary recycling and reuse:

• Aluminium can recycling: separate stream for shore disposal.
• Glass collection: separate stream.
• Cardboard separation: for recycling.
• Cooking oil: collection for shore biodiesel production rather than disposal.

The recycling extends beyond Annex V minimum but reduces operational costs and environmental impact.

Polar Code interaction

Polar Code Part II-A garbage provisions

Polar Code Part II-A introduces additional garbage provisions for polar operations:

• Food waste discharge prohibited in polar waters (extending Annex V Category C restrictions).
• All garbage retained for shore disposal except where specifically permitted.
• Reception facility coordination at polar ports.
• Documentation in the polar logbook.

The polar provisions reflect the limited environmental capacity of polar ecosystems to absorb garbage pollution and the long-lasting effects of any pollution event.

Specific polar challenges

Polar operations present specific garbage challenges:

• Limited reception: many polar ports have minimal reception facility capacity.
• Long voyage segments: between ports with reception, requiring substantial holding.
• Cold environment: affects waste decomposition and storage.
• Wildlife sensitivity: polar wildlife is especially vulnerable to pollution.

Cruise ships operating in polar waters typically have additional voluntary procedures beyond regulatory minimum.

Marine plastic pollution

Scale of the problem

Marine plastic pollution is one of the most visible environmental challenges:

• Estimated 8-12 million tonnes per year entering the ocean from all sources.
• Ship-source contribution: estimated 5-10 percent of total ocean plastic pollution.
• Plastic accumulation: in the five major ocean gyres (North Pacific, North Atlantic, South Pacific, South Atlantic, Indian Ocean).
• Microplastics: pervasive in marine ecosystems, food chain accumulation.
• Beach pollution: visible accumulation on coasts globally.

Annex V plastics ban effectiveness

The Annex V plastics ban has been partially effective but not comprehensive:

• Compliance variability: enforcement varies across regions and operators.
• Accidental loss: storms and accidents continue to release ship-source plastic.
• Cargo loss: container losses continue (X-Press Pearl 2021 produced massive pellet pollution).
• Microplastic generation: from operational sources (paint chips, fabric fibres) not addressed by bulk plastic ban.

X-Press Pearl casualty

The X-Press Pearl casualty (described in MARPOL Annex III article) released approximately 1,680 metric tonnes of plastic pellets into the marine environment off Sri Lanka, the largest single plastic pollution event from a ship in recent years. The casualty drove:

• IMO MEPC consideration of plastic pellet-specific provisions.
• Industry-led pellet stewardship programmes.
• Continuing research on pellet pollution impact.

Industry initiatives

Industry initiatives addressing marine plastic pollution:

• Operation Clean Sweep: industry pellet stewardship programme.
• Ocean Cleanup: technology development for ocean plastic removal.
• GhostNet: addressing lost fishing gear.
• Cruise Lines International Association (CLIA) plastic reduction programmes: voluntary plastic-use reduction.

The initiatives complement regulatory action but cannot substitute for it.

PSC inspection of Annex V

Inspection focus

PSC inspection of Annex V focuses on:

• Garbage Management Plan: presence, current, approved.
• Garbage Record Book Part I and Part II: completeness, consistency, no anomalies.
• Garbage handling equipment: operational, maintained.
• Garbage segregation: actual segregation matching the plan.
• Crew familiarity: with the plan and procedures.
• Discharge records: alignment with regulations.
• Reception facility receipts: for shore-side disposal.

Common deficiencies

Common Annex V deficiencies in PSC:

• Garbage Record Book entries inconsistent with operations.
• Plan outdated or not reflecting current ship configuration.
• Equipment non-functional (incinerator, compactor, shredder).
• Segregation incomplete with mixed categories.
• Crew unfamiliar with procedures.

A serious Annex V deficiency can result in detention.

Magic pipe equivalent for garbage

A specific pattern parallel to the OWS magic pipe issue: unauthorized garbage discharge. Detection through:

• Whistleblower reports: from current or former crew.
• PSC inspector observation: of inconsistencies in garbage records.
• Coastal state observation: of vessel-source garbage on shorelines.
• Aerial surveillance: from satellite or aircraft observing ship discharge plumes.

Penalties for unauthorized garbage discharge can be substantial in major flag and port states.

Insurance and liability

P&I cover

P&I cover for garbage-related incidents:

• Pollution liability for unauthorized discharge events.
• Cleanup costs if discharge results in shore-side cleanup obligation.
• Civil penalties under flag and port state law.
• Crew injury during garbage handling (chemical exposure, sharps injury, lifting injury).
• Wreck removal including garbage management.

Underwriting considerations

P&I underwriting reflects:

• Operator compliance record: clean records reduce premiums.
• Trade route exposure: routes through Special Areas may attract higher premiums.
• Ship type: passenger ships (high garbage volume) treated differently from cargo ships.
• Specific cargo: ships carrying HME cargoes have higher residue-related risk.

The insurance pressure complements regulatory enforcement.

Future evolution

Microplastics regulation

Microplastics regulation under development:

• MEPC discussion on microplastic-specific provisions.
• Source identification: paint, fabric, packaging, pellets, cosmetics.
• Treatment options: filtration, capture, source elimination.
• Implementation timeline: uncertain but progressing through 2020s.

Plastic pellet provisions

Plastic pellet provisions:

• Specific UN entries with Annex III marine pollutant designation under consideration.
• Packaging requirements to reduce loss probability.
• Container marking: identifying pellet cargo.
• Operator response capability: for pellet loss events.

The X-Press Pearl casualty has accelerated the pellet regulatory development.

Biodegradable plastics

Biodegradable plastics raise specific Annex V questions:

• Definition: what constitutes “biodegradable” in marine environment.
• Discharge regime: whether biodegradable plastics should be exempt from the Category A ban.
• Verification: how to certify biodegradability.
• MEPC discussion: continuing without resolution.

Special Area expansion

Special Area expansion proposals:

• Specific PSSAs considered for Annex V Special Area designation.
• Regional initiatives: through UNEP regional seas programmes.
• Climate-driven expansion: as climate change affects ecosystem sensitivity.

The Special Area system is likely to continue expanding through coming decades.

Cruise industry sewage and garbage management

Cruise industry voluntary standards

The cruise industry has adopted voluntary standards beyond Annex V minimum:

• CLIA member commitments: Cruise Lines International Association members commit to environmental performance exceeding regulatory minimums, including specific garbage management practices.
• Major operator standards: Royal Caribbean, Carnival, MSC, Norwegian and others maintain operator-specific environmental standards.
• Specific destination commitments: voluntary undertakings for sensitive areas (Caribbean reef areas, Alaska, Antarctic, Mediterranean).
• Plastic reduction programmes: phase-out of single-use plastics on board, with progressive elimination of plastic straws, stirrers, water bottles, packaging.
• Composting programmes: organic waste composting for shore disposal in approved facilities.
• Recycling streams: aluminium, glass, paper, plastic recycling routed through shore facilities.

The cruise industry leadership has substantially reduced cruise ship garbage volume per passenger over the past decade, with industry reporting 25 to 40 percent volume reduction since 2010.

Cruise ship garbage volume

Cruise ship garbage volumes:

• Mid-size cruise ship (3,000 passengers + 1,000 crew): approximately 6 to 8 cubic metres per day uncompacted.
• Large cruise ship (5,000 passengers + 2,000 crew): approximately 12 to 15 cubic metres per day.
• Mega cruise ship (8,000 passengers + 3,000 crew): approximately 20 to 25 cubic metres per day.

The volumes drive substantial cruise ship investment in compaction, segregation, and management infrastructure.

Cruise ship operational practices

Cruise ship operational practices:

• Daily collection: from each cabin, public area, galley, machinery space.
• Multi-stream segregation: at point of generation rather than centralised.
• Compaction and shredding: at central garbage room.
• Refrigerated food storage: during longer voyages.
• Reception facility transfer: at most port calls.
• Voluntary recycling: streams beyond MARPOL requirement.
• Crew training: substantial investment in garbage management training.

The operational practices reflect both regulatory compliance and reputational sensitivity.

Cargo ship garbage management

Cargo ship garbage characteristics

Cargo ship garbage characteristics:

• Volume: typically 50 to 200 litres per day for crew of 20 to 25.
• Composition: predominantly food waste, packaging materials, operational items.
• Variability: relatively constant over voyage.
• Storage: simpler than passenger ship, with smaller garbage room.

Cargo ship garbage management typically:

• Single garbage room with category bins.
• Compactor: standard equipment.
• Incinerator: optional, common on larger ships.
• Reception facility transfer: at port calls when reception is available.
• At-sea discharge: of permitted categories during transit.

Bulk carrier specific considerations

Bulk carriers have additional considerations:

• Cargo residue: from cargo discharge, classified under Category D or K.
• Hold cleaning waste: from preparation between cargoes.
• Dust and dunnage: from cargo handling.
• Special discharge regime for cargo residues per Category K provisions.

The bulk carrier garbage compliance is integrated with cargo handling procedures rather than separate.

Container ship specific considerations

Container ships have specific considerations:

• Container packing waste: dunnage, packaging from container preparation.
• Refrigerated container packing: for reefer containers.
• Damaged cargo handling: from container damage with content release.
• Ship’s stores packaging: from provisions and supplies.

Container ship garbage volume per crew is similar to cargo ships generally, with the additional considerations integrated through standard procedures.

Tanker specific considerations

Tankers have specific considerations:

• Tank cleaning slops: from cargo tank cleaning, partially overlapping with Annex II.
• Cargo residue: from cargo discharge, with HME considerations under Category K.
• Operational waste: from tanker operations including chemical-resistant packaging.
• Cargo monitoring waste: laboratory and sampling residues.

The tanker garbage management is integrated with cargo handling and Annex I/II compliance.

Annex V interaction with regional regulations

EU Port Reception Facilities Directive

The EU Port Reception Facilities Directive (Directive 2019/883/EC, replacing 2000/59/EC) provides EU-specific implementation:

• Reception facility provision at all EU ports, with minimum capacity standards.
• Waste delivery requirement: ships must deliver garbage at port of call (in most cases).
• Reception facility cost: indirect-fee basis to encourage delivery.
• Inspection regime: integrated with EU PSC.
• Reporting: through the EU SafeSeaNet system.

The EU directive is more prescriptive than MARPOL Annex V minimum and provides a model for other regional implementations.

US implementation

US implementation of MARPOL Annex V:

• Federal regulation: 33 CFR Part 151 implementing the convention.
• State regulations: in many coastal states with stricter provisions.
• APPS (Act to Prevent Pollution from Ships): domestic enforcement.
• USCG inspection: with enforcement priority on garbage compliance.
• Public reporting: annual MARPOL Annex V compliance statistics.

The US has been a leading enforcer of MARPOL Annex V with substantial penalties for violations.

STCW training and Annex V

Training requirements

STCW training for Annex V compliance:

• STCW Section A-V/2: familiarisation training including MARPOL Annex V provisions.
• Specific equipment training: on the ship’s actual garbage handling equipment.
• Plan familiarisation: each crew member familiarised with the Garbage Management Plan during initial training.
• Refresher training: at intervals during continuing professional development.

Crew responsibilities

Crew responsibilities under Annex V:

• Master: overall responsibility for compliance, signing of Garbage Record Book entries.
• Chief mate: typically the responsible officer for general garbage operations.
• Chief engineer: responsible for incinerator, compactor, and engine room garbage.
• Cook/galley staff: responsible for food waste segregation.
• Crew generally: responsible for proper segregation of garbage they generate.

Operational discipline

Operational discipline for Annex V:

• Pre-departure briefing: covering current voyage’s garbage management profile.
• Routine inspections: of garbage handling areas.
• Anomaly reporting: any unusual garbage events.
• Documentation discipline: timely, accurate entries.
• Continuous improvement: based on lessons learned.

The discipline is documented in the safety management system.

Annex V incidents and lessons

Cruise ship cases

Notable cruise ship Annex V cases:

• Princess Cruise Lines (2017): $40 million plea agreement covering MARPOL Annex I, V and other violations across multiple ships, related to oily water and garbage discharge.
• Carnival Cruise Lines (2019): $20 million additional fine related to ongoing MARPOL violations including garbage.
• Royal Caribbean (various): smaller incidents resulting in regulatory action.

The cruise industry cases have driven substantial industry-wide tightening of compliance procedures.

Container ship plastic incidents

Container ship plastic incidents:

• MV X-Press Pearl (2021): 1,680 metric tonnes of plastic pellets released, the largest single ship-source pellet pollution event.
• MOL Comfort (2013): container losses with plastic pellet content among other cargoes.
• Various smaller incidents: container losses with plastic content reaching shores.

Cargo residue incidents

Cargo residue incidents:

• HME residue discharge in violation of Category K provisions, identified through PSC inspection.
• Cargo washing water discharge with HME residue.
• Bulk cargo hold cleaning with inadequate segregation of HME residue.

These incidents drive operational discipline tightening.

Lessons applied

Lessons from Annex V incidents drive:

• Tightened procedures in cargo residue management.
• Enhanced PSC enforcement with priority on Annex V compliance.
• Improved equipment including cargo residue capture systems.
• Insurance pricing reflecting compliance risk.
• Industry initiatives including Operation Clean Sweep and pellet stewardship.

Documentation

Every ship covered by Annex V carries on board:

• Garbage Management Plan approved by flag state.
• Garbage Record Book Part I and Part II.
• Garbage handling equipment certificates including incinerator type approval.
• Crew training records in garbage management.
• MARPOL Annex V placard posted at conspicuous locations on board (containing summary of discharge regulations).
• Reception facility receipts for shore-side disposal.
• PSC inspection records.

Microplastics and emerging concerns

Microplastic sources from ships

Beyond the Category A bulk plastic discharge ban, microplastics generated during normal ship operations are increasingly recognised as a substantive pollution concern not directly addressed by current Annex V provisions. Sources include:

• Hull coating ablation: copper-based and non-biocide antifouling paints abrade over time, releasing micro-particles that contain coating polymer matrix material. Modern self-polishing copolymer (SPC) antifoulings are designed to release biocides through controlled hydrolysis, but the polymer matrix itself becomes microplastic in the marine environment.
• Synthetic fibre release: ropes, lines, fishing gear and polypropylene mooring tails shed micro-fibres during use, particularly under tension and during friction events.
• Fender and bumper degradation: foam fenders and rubber bumpers degrade slowly under UV and saltwater exposure, releasing micro-particles.
• Galley wash water: dishwashing and laundry water from on-board operations may contain polyester and acrylic micro-fibres from textile products.
• Plastic pellet operations: cargo pellet handling on chemical and product tankers, even with full Annex V compliance on bulk plastic, can release micro-pellet quantities through routine handling.
• Tank cleaning residues: cargo tank cleaning of plastic-bearing cargoes can release polymer residues into wash water that then enters oily water separator systems.

The IMO MEPC working group on marine plastic pollution has recognised these sources and is developing guidance addressing each, with progressive incorporation into Annex V regulatory framework expected through the late 2020s. The technical complexity of regulating microplastics arises from definitional difficulties (when does a piece of plastic become “micro”?), measurement challenges (sampling and analysis is far harder than bulk plastic counting), and source attribution problems (microplastic in seawater could come from many sources).

Biodegradable plastic complications

The increasing market presence of biodegradable plastics (PLA, PHA, PHB, starch-based polymers) creates regulatory ambiguity under the current Annex V framework. The Category A definition does not distinguish between conventional petroleum-derived plastics and bio-based or biodegradable alternatives. Under strict interpretation, all polymer materials regardless of biodegradability characteristic fall under the Category A discharge prohibition.

Industry advocates argue that genuinely marine-biodegradable plastics should be permitted at-sea discharge, treating them analogously to food waste under Category C with appropriate distance and comminution requirements. Regulators argue that:

• Marine biodegradability is environment-dependent: a plastic that biodegrades in tropical surface waters may persist for decades in cold deep water.
• Verification is difficult: laboratory biodegradability tests do not always predict field performance.
• Mixed-stream contamination: “biodegradable” plastic mixed with conventional plastic in cargo or operations would defeat any easing of the regime.
• Enforcement complexity: PSC inspectors cannot readily distinguish biodegradable from conventional plastic in waste streams.

The MEPC has tasked subsidiary working groups with developing criteria for marine biodegradable plastics, with formal regulatory provisions still under development. Most operators and class societies advise treating all plastic conservatively under Category A regardless of marketing claims about biodegradability, until a clear regulatory framework emerges.

Plastic pellet trade volume and risk

Plastic pellet (nurdle) trade is one of the largest single global plastic-flow streams, with approximately 35 to 50 million metric tonnes shipped internationally each year as raw feedstock for downstream plastic manufacturing. The pellets are typically packaged in 25-kilogram or 50-kilogram woven polypropylene bags, themselves stuffed into shipping containers. Pellet loss can occur through:

• Bag damage: tearing during handling, abrasion in transit.
• Container damage: from rough handling, weather, accidents.
• Collision and grounding: catastrophic loss as in X-Press Pearl 2021.
• Cargo handling spillage: at terminals during transfer.
• Routine handling: small quantities during normal operations.

The X-Press Pearl casualty drove Operation Clean Sweep (an industry-led pellet stewardship initiative) and Maritime Pellets Code of Conduct development. Specific industry measures include:

• Improved packaging: leak-resistant bags, double-bagging for high-value or sensitive consignments.
• Spill response equipment: specialised pellet recovery equipment at major ports.
• Container marking: identification of pellet cargo for emergency response priority.
• Crew training: specific training on pellet incident response.
• Insurance and claims: pellet-specific coverage and claims handling.

The IMO is considering specific UN entries for plastic pellets that would bring them under MARPOL Annex III marine pollutant designation, providing the regulatory basis for stricter packaging and handling. The proposal has substantial industry opposition due to compliance cost implications but has growing regulatory traction in the wake of pellet pollution events.

Microbeads in personal care products

A specific microplastic concern relates to microbeads in personal care products (face wash, exfoliants, toothpaste). While microbeads from ship operations are not the principal source of marine microbead pollution (the main source being domestic wastewater), they nevertheless contribute. Cruise ship discharge of grey water containing personal care products with microbeads is a recognised concern that has driven:

• Voluntary phase-out: by major cruise lines of microbead-containing personal care products supplied to guests.
• National regulations: US, UK and EU regulations restricting microbeads in personal care products, indirectly reducing ship-source microbead discharge.
• Cruise industry standards: CLIA member commitments going beyond regulation.

Annex V enforcement trends

Increasing enforcement activity

Annex V enforcement has intensified substantially since 2015, driven by:

• Public attention to marine plastic pollution.
• Major casualty events (X-Press Pearl, container losses).
• Whistleblower programmes in major flag and port states.
• Industry initiative: many operators report violations to clean up the industry.
• Coordinated PSC campaigns: Tokyo MoU, Paris MoU and other PSC organizations have run focused inspection campaigns specifically on Annex V compliance.
• Public reporting: of detentions and fines, creating reputational pressure.

The trend is for enforcement to continue tightening, with substantial penalties for documented violations.

Magic pipe parallel for garbage

A specific enforcement concern parallel to the oily water separator magic pipe issue is unauthorized garbage discharge through illegal bypass arrangements. Detection methods include:

• Whistleblower programmes: US APPS Whistleblower Program offering up to 50% of recovered fines as reward to crew members reporting violations. Substantial rewards (in some cases millions of dollars) drive crew reporting.
• Coastal observation: of vessel-source garbage on shorelines or floating in port approach areas, with photographic documentation.
• Aerial and satellite surveillance: increasingly used for major Special Areas. Satellite imagery can document discharge plumes; aerial surveillance covers approach waters.
• Records cross-checking: PSC inspection cross-checking Garbage Record Book entries against actual reception facility receipts and operational records to detect inconsistencies.
• Crew interview: in detail with current and former crew about actual operational practices.

Major Annex V enforcement cases have typically resulted from a combination of these methods, with whistleblower reports frequently triggering more detailed investigation that uncovers documentary evidence.

Recent significant Annex V settlements

Beyond the cruise industry cases noted earlier, significant recent Annex V settlements include:

• Diana Shipping plea agreement (2018): substantial fine related to falsified Annex V records on bulk carriers.
• Various tanker operators: smaller fines related to cargo residue and operational waste violations.
• Container ship operators: penalties related to lost cargo containing plastic.
• Fishing vessel operators: penalties for net dumping and gear-discard violations.

The settlements typically combine Annex V violations with Annex I (oil pollution) and Annex VI (air pollution) issues, reflecting that ships with poor compliance culture often have multiple-annex problems. Total settlements for major MARPOL cases routinely exceed 10-20 million USD, with the Princess Cruise Lines case at 40 million USD being the high-water mark for a single settlement. The investigative agencies (US Department of Justice, EPA, Coast Guard, foreign equivalents) have built substantial expertise in MARPOL prosecution and continue active enforcement programs.

Enforcement effectiveness measurement

Measuring Annex V enforcement effectiveness is challenging because:

• Compliance is invisible when working: only violations produce visible evidence.
• Beach monitoring provides indirect evidence: ship-source plastic on beaches indicates residual non-compliance, but causal attribution to specific vessels is rare.
• Self-reported data through Garbage Record Books has obvious limitations: violators do not record violations.
• Reception facility data provides a check: total garbage received at major ports can be benchmarked against expected volumes from port traffic.

Industry estimates suggest substantial improvement in Annex V compliance over the past two decades, with ship-source plastic pollution as a percentage of total ocean plastic having declined from estimated 20-30% in the 1990s to under 10% in current estimates. The improvement reflects both regulatory tightening and industry cultural change toward environmental performance as a competitive differentiator.

Conclusion

MARPOL Annex V is one of the most actively-enforced and operationally significant MARPOL annexes, addressing the full diversity of garbage generated through ship operations with category-specific discharge regimes, comprehensive documentation requirements, and substantial Special Area provisions. The combination of the foundational global plastics ban (in force since 1988), the 11-category classification system (current since 2013), and the progressively tightening Special Area regime produces a framework that has substantially reduced ship-source garbage pollution compared to historical levels while continuing to evolve in response to emerging issues including microplastics, plastic pellets, biodegradable plastics, and electronic waste. Crew members and ship managers responsible for Annex V compliance must understand the regulatory framework (the 11 categories, the Special Area regime, the documentation requirements), the operational practices (segregation, processing, reception facility transfer), and the enforcement landscape (PSC inspection priorities, whistleblower programmes, substantial penalties for violations) that together produce reliable compliance. As the maritime industry navigates the transition to circular economy practices, decarbonisation, and stricter environmental standards, Annex V will continue to evolve, but the fundamental purpose, preventing ship-source garbage pollution of the marine environment, remains a constant focus of marine environmental engineering and operations.

Related Calculators

• MARPOL Annex V - Garbage discharge distance lookup Calculator
• Annex V Polar Code, Garbage Rules Calculator
• MARPOL Annex V, Garbage Disposal Check Calculator

See also

• MARPOL Convention parent article
• MARPOL Annex I: Oil Pollution Prevention
• MARPOL Annex II: Noxious Liquid Substances
• MARPOL Annex III: Harmful Substances in Packaged Form
• MARPOL Annex IV: Sewage
• MARPOL Annex VI: Air Pollution
• Polar Code
• Container Ship

References

• IMO, International Convention for the Prevention of Pollution from Ships (MARPOL), 1973, as modified by 1978 Protocol, as amended, Annex V.
• IMO Resolution MEPC.201(62) (2011), Adoption of revised Annex V (entered into force 2013).
• IMO Resolution MEPC.244(66) (2014), Standard specification for shipboard incinerators.
• IMO Resolution MEPC.295(71) (2017), Adoption of amendments to Annex V regarding garbage record book and HME provisions.
• IMO MEPC.1/Circ.834, Guidelines for the development of garbage management plans.
• Polar Code Part II-A (Resolution MSC.385(94) and MEPC.264(68)).
• UN Environment Programme reports on marine plastic pollution.
• Operation Clean Sweep industry pellet stewardship documentation.
• Cruise Lines International Association (CLIA) environmental performance reports.