What is the new grain loading classification under IMO MSC.552(108)?

The amendment introduces revised loading conditions for bulk grain cargoes, including partial filling scenarios in specially suitable compartments where grain reaches hatch end beam levels.

Do shipboard loading computers require updates for this resolution?

Yes. Where applicable, shipboard loading computers and stability software must be updated to reflect revised grain stability and loading criteria under the new requirements.

Who is responsible for compliance with IMO MSC.552(108)?

Shipowners, operators, and technical managers are responsible for ensuring vessels comply with applicable IMO stability and loading requirements.

Does this affect existing bulk carrier operations?

Yes. Bulk carriers must ensure loading procedures, documentation, and stability calculations align with updated IMO grain loading criteria where applicable.

IMO MSC.552(108) Compliance & New Grain Stability Software Update

The International Maritime Organization (IMO) has adopted significant amendments to the International Grain Code through Resolution MSC.552(108), which will take effect on 1 January 2026 and will be applicable to both new and existing ships.

IMO MSC.552(108)

The entry into force of IMO Resolution MSC.552(108) on January 1, 2026, marks a major change in bulk carrier operations. This amendment to the International Grain Code introduces a critical fourth loading condition that directly impacts stability management.

We offers a re-engineered Grain Stability Software solution to ensure your fleet remains compliant, leverages new operational flexibilities, and avoids port detentions.

Previously, the Grain Code recognized three loading conditions. The latest amendment introduces a fourth: "Specially suitable compartment, partly filled in way of the hatch opening, with ends untrimmed."

This allows you to omit time-consuming end-trimming, but it mandates new recalculations of grain heeling moments and updated curves in your vessel's Grain Loading Manual.

PAMS Pacific Admiralty Maritime Services IMO Resolution MSC.552(108)

This new condition applies to any 'specially suitable compartment' where the grain is not filled to the maximum extent within the hatch opening, but reaches a level at or above the bottom edge of the hatch end beams. In such cases, the grain surface outside the hatch perimeter typically remains at its natural angle of repose unless trimmed.

Previously, the applicable heeling moments for untrimmed voids at the ends were not clearly defined. The new amendment addresses this by requiring Grain Loading Manuals to include specific heeling moment values for this condition, thereby allowing for an exemption from trimming the ends.

Sollution and Timeline

Automated Calculations

Built-in logic for revised 30° natural angle of repose and the mandatory 1.12 safety factor for transverse heeling moments.

Dynamic Curve Generation

Instant generation of the new grain shift moment and volume curves required for your mandatory Stability Booklet Addendum.

Class Approval Support

We manage all technical documentation and support the submission to your Classification Society to ensure final certification.

IMO MSC.552(108) – Blog Article Download IMO MSC.552(108) Brochure

PAMS Pacific Admiralty Maritime Services

Technical Content Review

Last Technical Review: July 2026

Review Frequency: Content is reviewed periodically to reflect current international maritime regulations, recognized industry guidance, and technical best practices.

Referenced Standards: IMO, IACS, OCIMF, RightShip RISQ, SOLAS, MARPOL, MLC 2006, applicable Flag State requirements, and Classification Society rules, where relevant to the service.

IMO Resolution MSC.552(108) Compliance FAQ

New loading classification?

A "partly filled" scenario for "specially suitable" compartments where grain reaches the hatch end beams, but ends remain untrimmed.

Purpose of the amendment?

To increase operational efficiency and flexibility by reducing trimming requirements while maintaining strict international safety standards.

Technical requirements?

Surface assumes a 30° slope. Total heeling moment is calculated as 1.12x the transverse moment to account for vertical grain shift.

Cargo manual updates?

Yes. Grain stability manuals must include this new condition and require formal approval from your Classification Society.

Stability software updates?

Yes. Shipboard loading computers must be updated with the new grain criteria and calculation methods to ensure full compliance.

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