Cargo Record Book Requirements Under MARPOL Annex II

Cargo record book requirements under MARPOL Annex II oblige every ship carrying noxious liquid substances in bulk to log each loading, internal transfer, unloading, tank cleaning, prewash, ballasting, and discharge, using standardized operation codes, signed by the officer in charge and countersigned by the master, kept on board for three years from the last entry. The book is the vessel’s primary proof that its crew handled potentially harmful chemicals in compliance with the convention, and Port State Control officers treat a missing or incomplete book as grounds for detention.1Paris MoU. Guidance on Detention and Action Taken

Which Ships Have to Keep One

Annex II applies to any ship constructed or adapted to carry noxious liquid substances in bulk.2TRACECA. MARPOL Annex II Requirements That covers dedicated chemical tankers, combination carriers, and any other vessel whose tanks transport liquid products identified in the International Bulk Chemical (IBC) Code.3International Maritime Organization. International Code for the Construction and Equipment of Ships Carrying Dangerous Chemicals in Bulk (IBC Code) Tonnage is not a factor. A small coastal chemical carrier faces the same recording obligation as a large oceangoing tanker.

Operations That Must Be Recorded

Every entry is tagged with a standard letter code so inspectors from any country can read the book. Each code corresponds to a distinct stage in the cargo handling cycle:4Republic of the Marshall Islands Maritime Administrator. Cargo Record Book Instructions

  • A — Loading: date, time, port, tank identification, substance name, and quantity.
  • B — Internal transfer of cargo between tanks during the voyage.
  • C — Unloading, with the same details as loading, recorded at the discharge port.
  • D — Mandatory prewash carried out per the ship’s Procedures and Arrangements Manual, typically required for Category X substances.
  • E — Other tank cleaning, including additional washing, final rinse, or ventilation beyond the mandatory prewash.
  • F — Discharge of tank washings into the sea, with the discharge rate, the time pumping started and stopped, and the ship’s speed during discharge.
  • G — Ballasting of cargo tanks that previously held chemicals.
  • H — Discharge of that ballast overboard.
  • I — Accidental or exceptional discharge.
  • J — Control by authorized surveyors, including notes from surveyor inspections of tank conditions.
  • K — Additional remarks that don’t fit the other codes.

Category X substances, the most severe pollution hazard, trigger the most involved entries. The tank must be prewashed in port under a surveyor’s supervision before the ship departs, and the washings must go to a shore reception facility until the effluent concentration drops to 0.1% by weight or lower.5United States Coast Guard. MARPOL Annex II Summary Every step of that operation belongs in the book under the appropriate code.

When residues or washings go to a shore-based reception facility instead of being discharged at sea, the master should obtain a receipt from the facility operator showing the quantity transferred and the date and time. That receipt stays with the cargo record book.6United States Coast Guard. NVIC 03-06 – Guidance on MARPOL Annex II Implementation

How Entries Are Made and Signed

Entries follow a strict chronological sequence and must be made promptly after each operation is completed. The officer in charge of the operation signs the entry, and each completed page must be signed by the master.4Republic of the Marshall Islands Maritime Administrator. Cargo Record Book Instructions The double signature confirms that both the person who did the work and the person responsible for the ship’s overall conduct have reviewed the record. Entries out of sequence, entries without signatures, and unexplained gaps are exactly what Port State Control officers look for.

Language

Regulation 15(4) requires entries “at least in English, French or Spanish.” If the ship also uses the national language of its flag state, that national-language version takes precedence in any legal dispute.4Republic of the Marshall Islands Maritime Administrator. Cargo Record Book Instructions Most vessels use English because it is the working language of international shipping, but the regulation gives crews the option of French or Spanish.

Correcting Mistakes

When someone makes an incorrect entry, cross out the wrong text with a single line so the original remains legible. The officer responsible for the operation writes the corrected information alongside, adds the date, and signs the correction. The master then countersigns the corrected entry.7International Registries, Inc. Record Book Instructions – Error Correction Heavy cross-outs, whiteout, or torn pages will read to an inspector as potential falsification. Training officers to double-check entries before writing is safer than fixing them afterward.

Recording Accidental Discharges and Equipment Failures

Accidental or exceptional discharges of noxious liquid substances use Code I and carry heightened recording requirements. The entry must capture the time of the incident, the approximate quantity released, the substance name and pollution category, and a description of the circumstances that caused the discharge.4Republic of the Marshall Islands Maritime Administrator. Cargo Record Book Instructions Regulation 15 separately requires the crew to record the reason for any accidental discharge.

Equipment failures during cargo operations also need documentation, even when nothing goes overboard. If monitoring or control systems fail, the record should note the time the failure occurred, the time the system was restored, and the reason for the failure.8LISCR (Liberian Registry). Marine Operations Note 07/2010 – Equipment Failure Recording Omitting an equipment failure from the record doesn’t make the problem disappear; it makes it look intentional.

Retention and What Inspectors Check

A completed cargo record book must stay on board for three years from the date of the last entry.4Republic of the Marshall Islands Maritime Administrator. Cargo Record Book Instructions It has to be readily available for inspection at any reasonable time and stored where crew can produce it quickly.9Isle of Man Ship Registry. MSN 067 – MARPOL Annex II

Port State Control officers can board foreign vessels in port, verify certificates, and inspect operational records under international conventions.10International Maritime Organization. Port State Control They compare the log against the physical condition of the cargo tanks and piping. If the book says a tank was cleaned but residue coats the walls, that inconsistency triggers deeper investigation. When a vessel changes ownership, the book should stay with the ship so the operational history is continuous; the new owner inherits the compliance record.

Electronic Cargo Record Books

MARPOL now permits electronic record books, but only after the flag state administration has approved the specific system. The ship must carry a written declaration from the administration confirming that approval.11International Maritime Organization. Guidelines for the Use of Electronic Record Books Under MARPOL – Resolution MEPC.312(74) Without that declaration on board, a Port State Control officer can treat the electronic system as if it doesn’t exist and ask for a paper book.

An approved system must include:

  • Role-based access control: every user gets a unique login, and the system tracks who entered, viewed, or amended each record.
  • Tamper protection: once an entry is saved, it cannot be altered without the change being automatically logged and visible in both the system and any printout, with the original entry and every amendment preserved permanently.
  • Master verification using an additional authentication factor beyond the normal login, with a status field showing whether entries are pending, awaiting verification, or verified. An amendment after verification automatically resets the entry to pending.
  • Automatic encrypted backups to offline storage every time changes are made, with offline copies in read-only format.
  • Hard-copy capability: on request, the system must produce a printed record the master can certify as a true copy, with each page showing the name of the person who made the entry, any amendments, the date and time of printing, and the software version.
11International Maritime Organization. Guidelines for the Use of Electronic Record Books Under MARPOL – Resolution MEPC.312(74)

If the electronic system fails, crew must be able to switch to manual input, and the system must record that the data source changed. Hardware must comply with IEC 60092 (electrical installations on ships) and IEC 60533 (electromagnetic compatibility). A system that doesn’t meet them won’t pass flag state approval.

What Happens When the Book Fails Inspection

MARPOL itself does not set fine amounts. It requires each signatory nation to establish penalties “adequate in severity to discourage violations,” so consequences vary by flag and port state. Across regional inspection regimes like the Paris MoU, Tokyo MoU, and Indian Ocean MoU, the immediate consequence of a cargo record book deficiency is detention. The vessel cannot sail until the deficiency is resolved, and it may be flagged for increased inspection targeting on future port calls.1Paris MoU. Guidance on Detention and Action Taken

In the United States, the Act to Prevent Pollution from Ships gives enforcement teeth. A knowing violation of MARPOL or APPS is a Class D felony, carrying up to 5 years in prison alongside criminal fines.12Office of the Law Revision Counsel. 33 USC 1908 – Penalties for Violations Civil penalties for a general MARPOL violation can reach $93,058 per violation per day under inflation-adjusted figures effective after December 2025. A false statement in a required record carries a separate civil penalty of up to $18,610 per statement.13eCFR. 33 CFR 27.3 – Penalty Adjustment Table

Federal prosecutors treat record book falsification as obstruction of the government’s ability to investigate illegal discharges. In one representative case, a shipping company paid $1.5 million in fines for failing to record oily bilge water discharges and was required to implement an enhanced environmental compliance plan with independent auditing across nine vessels.14United States Department of Justice. Shipping Company Fined 1.5 Million for Oil Record Book Offense The cover-up consistently draws heavier consequences than the underlying discharge would have.