Harmonizing Cargo Ship Watertight Door Requirements

Background

MGN 689 (M) illuminates the recent amendments to international maritime safety conventions and codes, focusing on standardizing the requirements for watertight doors in cargo ships. These changes impact several key maritime instruments, including the 1988 Load Line Protocol, MARPOL Annex I, the IBC Code, and the IGC Code.

Ambulatory References and Harmonization

The amendments arise from a need to address inconsistencies in the construction requirements of various maritime conventions and codes, particularly those related to watertight doors. This led to a comprehensive review by the International Maritime Organization (IMO), aiming for clarity and uniformity rather than developing new requirements.

Specific Amendments

Each of the affected instruments underwent revisions to align their requirements for watertight doors with those in SOLAS regulation II-1/13-1. These amendments will apply to all ships, including existing ones, to ensure a consistent approach to maritime safety without imposing additional burdens.

1988 Load Line Protocol

The amendments to the 1988 Load Line Protocol, implemented via IMO resolution MSC.491(104), clarify the types of watertight doors and their requirements, ensuring consistency with SOLAS regulations.

MARPOL Annex I

Similarly, MARPOL Annex I underwent revisions concerning the construction of oil tankers, particularly regarding watertight doors, through IMO Resolution MEPC.343(78).

IBC Code

For chemical tankers, the IBC Code was amended to align its watertight door requirements with SOLAS standards, as per IMO Resolutions MEPC.345(78) and MSC.526(106).

IGC Code

The IGC Code, concerning gas carriers, also saw amendments in line with SOLAS regulation II-1/13-1, as implemented by IMO Resolution MSC.492(104).

Implementation and Impact

These amendments will take effect internationally and in the UK on 1 January 2024 for the Load Line Protocol, MARPOL Annex I, and the IGC Code, and on 1 July 2024 for the IBC Code. The UK will implement these changes through ambulatory referencing in its domestic legislation.

Conclusion

The harmonization of requirements for watertight doors across these key international instruments reflects a significant step towards enhancing maritime safety. By aligning these standards with SOLAS regulations, the maritime sector moves closer to a unified and effective approach in ensuring the safety of cargo ships.

All regulations can be found at legislation.gov.uk

For more information, please see the document below (available only to subscribers):

Amendments to International Conventions and Mandatory Instruments - Requirements for Watertight Doors on Cargo Ships