Useless or superfluous matter which is to be discarded. Incineration of burnable waste is the most efficient means of disposal.
- Cargo-associated waste – All materials which have become waste as a result of use on board a ship for cargo stowage and handling: dunnage, shoring plates, lining and packing materials, plywood, paper, cardboard, wire and steel strapping.
- Domestic waste – All types of food wastes, sewage and wastes generated in the living spaces on board the ship.
- Food wastes – Spoiled or unspoiled victual substances, such as fruits, vegetables, dairy products, poultry, meat products, food scraps, food particles, and all other materials contaminated by such wastes, generated aboard ship, principally in the galley and dining areas.
The amount of food waste on board a cruise ship makes the proper treatment a necessity. The equipment includes pulpers, disposers (for bones) and water extractors.
- Hazardous waste – Anything that is flammable, corrosive or toxic but also including solvents, oils and other substances.
- Maintenance waste – Materials collected in the engine and deck departments while maintaining and operating the vessel, such as soot, machinery deposits, scraped paints, deck sweeping, wiping wastes, rags, etc.
- Medical waste – Infectious agents, human blood and blood products, body parts, contamined bedding, surgical waste and additional medical items.
- Operational wastes – All cargo-associated waste and maintenance waste, and cargo residues defined as garbage under cargo residues.