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MARPOL: understanding your obligations

Enter your vessel details and we will show which MARPOL Annex requirements may apply (Annex I to VI). LOA is required. Other fields improve accuracy. You can also add jurisdiction and activity details to reveal local and port requirements.

This tool provides guidance only. Flag State rules, vessel certification, trade area, and local marina, port or protected area requirements may add obligations. When in doubt, retain waste onboard and use reception facilities ashore. If local rules conflict, always follow the stricter requirement.

Length Overall (m)

Required - LOA in metres

Gross Tonnage (GT)

Optional - From Tonnage Certificate

Persons Certified

Optional - Safe Manning or Certificate

Vessel Category

Improves Annex IV and V assumptions

Operating Area

Improves Annex V and VI relevance

Sewage System

Improves Annex IV guidance

Bilge and Oil Control

Oily water separator fitted (OWS)

Oil tanker

Improves Annex I guidance

Engines and Fuel

Uses fuel oil (engines or generators)

Any marine diesel engine > 130 kW

Refrigeration or AC using refrigerants

Improves Annex VI guidance

Cargo (if applicable)

Carries noxious liquid substances in bulk (Annex II)

Carries dangerous goods packaged (Annex III)

Usually not applicable to leisure craft

Country / Jurisdiction

Used for local rules (add more as you build)

Activity Type

Helps apply local washdown and discharge rules

Discharge / Capture Method

Local rules often depend on this

Cleaning Product Status

Products verified "non-harmful to the marine environment"

If unchecked, local discharge is often higher risk

Get Results

Placards ≥12 m - GMP ≥100 GT or ≥15 persons - GRB ≥400 GT