Under MARPOL, what are the specific discharge regulations related to solid bulk cargo residue?

Under MARPOL Annex V, the discharge of solid bulk cargo residues is generally prohibited except under specific conditions and within defined geographical areas. Solid bulk cargo residues are defined as the remnants of dry cargo that remain on board after unloading operations are completed. The discharge of these residues into the sea is prohibited unless they are classified as not harmful to the marine environment according to specific criteria outlined in MARPOL. Even if classified as not harmful, discharge is only permitted when the ship is en route, as far as practicable from the nearest land (at least 12 nautical miles), and in waters deeper than 25 meters. Residues containing cleaning agents or additives are strictly prohibited from discharge. Additionally, certain special areas may have stricter regulations or complete prohibitions on the discharge of any solid bulk cargo residues. Ships are required to maintain a garbage record book to document all discharges, including the type, estimated amount, location, and date and time of the discharge. These regulations aim to minimize the pollution of the marine environment from solid bulk cargo residues, protecting marine life and coastal ecosystems.