Crew - What to know about IHM Maintenance Tasks
To perform IHM Maintenance tasks with the NautilusLog IHM Tool, you can either refer to the 18-minute video tutorial, which provides a step-by-step guide on essential processes and functionalities or the text instructions below.
📽️ VIDEO:
The video covers navigating the tool's interface, accessing and completing maintenance tasks while emphasizing best practices for compliance and accurate IHM log records. The tutorial offers insights into understanding how to use the tool to complete IHM Maintenance tasks.
1. Introduction:
The NautilusLog IHM Tool is designed to support vessel crews in complying with the Inventory of Hazardous Materials (IHM) regulations. This guide provides detailed instructions for crew members on handling, recording, and reporting tasks related to items onboard that may contain hazardous materials.
Proper use of the tool ensures:
-
Compliance with international IHM regulations.
-
Accurate documentation of hazardous materials.
-
Streamlined communication between vessel, headquarters (HQ), suppliers, and IHM experts.
2. IHM Maintenance Process Overview:
How we streamline IHM Maintenance Process
-
Requisition Creation – The vessel requests items required onboard to HQ.
-
Approval & Purchase – HQ approves requisitions and issues Purchase Orders (POs) to suppliers.
-
Delivery & Documentation – Suppliers deliver items to the vessel and provide documentation to NautilusLog and IHM experts.
-
Data Processing – IHM experts process the PO data (via API or manual imports) and categorize items as IHM relevant or not relevant.
-
Task Creation – For IHM relevant items, crew tasks are generated in the NautilusLog IHM Tool by the IHM Expert.
-
Crew Execution – Vessel crew must complete all assigned tasks: storing, installing, discharging, or tagging items.
3. Categorization of Hazardous Materials into IHM Table A & B:
The Inventory of Hazardous Materials (IHM) is a regulatory framework that ensures vessels are monitored for the presence of dangerous substances throughout their operational life. To simplify identification and management, hazardous materials (HazMats) are divided into two categories: Table A and Table B.
3.1. Table A – Substances to be Removed:
Definition: These are materials considered prohibited for use onboard ships under international conventions (such as the Hong Kong Convention and EU Ship Recycling Regulation).
Requirement: If present, they must be identified, flagged, and safely removed from the vessel.
Rationale: Such substances pose significant health and environmental risks even when left unused onboard.
List of IHM Table A Hazmats:
3.2. Table B – Substances Allowed with Documentation:
Definition: These are materials that may still be used and allowed onboard but are strictly controlled.
Requirement: Their presence, location, and handling procedures must be documented in the IHM, ensuring traceability throughout the vessel’s lifecycle.
Rationale: These substances are not outright banned but require oversight to prevent misuse, accidental release, or unsafe handling.
List of IHM Table B Hazmats:
4. Crew Tasks:
4.1 Overview:
The following workflow applies whenever a new crew task is received in NautilusLog.

4.2 Crew Task Summary Table:

4.3 Explanation of Crew Responsibilities for IHM :
After hazardous materials are categorized into Table A and Table B, the vessel crew plays a crucial role in ensuring compliance by handling these materials appropriately. Each category dictates a specific type of crew action and documentation requirement.
4.3.1 Handling of HazMat Items:
Table A items (e.g., asbestos, ODS): Must be carefully isolated and prepared for removal. No new installation or storage is allowed.
Table B items (e.g., heavy metals, PCBs): Can be used or stored onboard, but their exact location and condition must be tracked.
Crew must ensure safe handling during delivery, deck transfers, storage, or installation, following established safety protocols to avoid contamination or exposure.
4.3.2 Tagging of Items:
Every IHM-relevant item must be clearly identified. Crew are responsible for printing and attaching IHM-compliant tags immediately upon receipt.
Tags should be:
- Durable and clearly legible.
- Attached in a way that remains visible during storage, installation, or transfer.
4.3.3 Recording All Actions Related to IHM:
All actions related to IHM items must be logged in the NautilusLog system, including:
- Handling (delivery, storage, installation, movement).
- Tagging (when and where the tag was applied).
- Removal or discharge (with supporting documents).
Documentation must be accurate, complete, and uploaded in real time. Supporting files (e.g., discharge receipts, removal certificates) must always be attached for compliance checks.
4.3.4 Removal of Items listed as Hazardous Materials:
For items classified under Table A, crew must ensure their safe removal as per IHM and environmental regulations. Discharge must always be accompanied by proper documentation uploaded in NautilusLog. Improper removal or undocumented discharge can result in serious compliance violations.