Question 1

RISQ Q5.18-5.19 requires a shipper declaration on whether solid bulk cargo residue is "Harmful to the Marine Environment" (HME), with the Garbage Record Book splitting cargo residues into HME (category K) and non-HME (category J) — HME residue that cannot be recovered by normal methods must go to a shore reception facility, not the sea. Why does this classification matter practically for a crew member deciding how to dispose of swept-up cargo residue after discharge?

Accepted Answer

The disposal method that is legal for ordinary, non-hazardous cargo residue (sea discharge in line with MARPOL Annex V rules) is NOT legal for HME-classified residue regardless of quantity — a crew member who treats all cargo residue the same way, without checking the shipper's HME declaration for that specific cargo, risks an illegal discharge even while believing they are following normal practice This is a genuine, easy-to-miss compliance trap: "we always sweep residue overboard, that's normal" is exactly the kind of habitual practice that becomes a real MARPOL Annex V violation the moment the cargo in question happens to be HME-classified. The shipper's declaration is the input that should change crew behaviour on a cargo-by-cargo basis, not a one-size-fits-all routine.

Question 2

RISQ Q5.1 requires the Oil Record Book Part 1 to be completed correctly, with distinct sections for non-automatic bilge discharge (D), automatic discharge systems (E), oil filtering equipment defects (F), accidental discharges (G), bunkering (H), and voluntary bilge-holding-tank declarations (I). Why does the ORB use this many separate, specific sections rather than one general "discharge log"?

Accepted Answer

Each section corresponds to a distinct operational scenario with its own compliance requirements and risk profile — collapsing them into one general log would make it impossible to verify which specific control applied at the time (e.g. whether the oil filtering equipment was working, or whether a discharge was accidental versus routine), which is exactly what an inspector or investigator needs to establish after the fact This structure is what makes the ORB forensically useful, not just a record-keeping formality — a code "I" entry (filtering equipment defective, valve sealed shut) tells a very different story from a code "G" entry (accidental discharge), and conflating them would defeat the purpose of being able to reconstruct exactly what happened and why during any given discharge event.

Question 3

RISQ's guidance on emergency bilge suction and overboard discharge valves (Q5.13) states that sealing these valves in the closed position "shall not be construed as a requirement for the valve to be blanked or physically locked" and that the valve "shall always remain available for use in case of an emergency." Why does the regulation deliberately avoid a method (like a padlock) that would make the valve harder to open?

Accepted Answer

A numbered breakable seal achieves the pollution-prevention control (detecting and recording any unauthorised opening) without compromising the valve's availability for genuine emergency use — a padlock or blank would prevent accidental/unauthorised discharge equally well, but could also delay or block legitimate emergency use when the valve is actually needed, which is an unacceptable trade-off for an emergency-designated valve This is a deliberately balanced control: the breakable-seal method satisfies the pollution-prevention need (you can tell if the valve was opened without authorisation, and a record trail exists) while preserving the valve's core purpose as an emergency device that must never be genuinely obstructed. A method that fully prevented opening would defeat the valve's reason for existing.