Answer
The Inventory of Hazardous Materials (IHM) is a critical document under the Hong Kong Convention and the EU Ship Recycling Regulation (EU SRR). It aims to ensure the safety of crew members and minimize environmental risks during a ship's operation and eventual recycling.
The IHM is divided into three distinct parts, categorized by when the materials are identified and their nature.
IHM Part I: Hazardous Materials in Ship Structure and Equipment
This is the most significant section as it remains active throughout the entire lifespan of the vessel.
Scope: Identifies hazardous materials contained in the ship's structure and fixed equipment (e.g., asbestos, ozone-depleting substances, PCBs, and certain heavy metals).
Requirement: It must be onboard for all existing ships and newbuilds.
Maintenance: It is a "living document." Any time the ship undergoes repairs, conversions, or equipment replacements, Part I must be updated to reflect any new hazardous materials brought onboard or removed.
Surveys: It is subject to initial, renewal, and occasional surveys to maintain the International Certificate on Inventory of Hazardous Materials.
IHM Part II: Operationally Generated Wastes
Part II focuses on the waste produced during the day-to-day operation of the ship as it nears the end of its life.
Scope: Includes waste streams that are not part of the ship's structure but are present on the vessel. This includes:
Garbage (as defined by MARPOL Annex V).
Bilge water and sludge.
Spent oil and chemical residues.
Requirement: This part is only required to be developed when the ship is decided to be sent for recycling.
IHM Part III: Stores
Part III covers items that are consumed or used during the voyage and are currently held in the ship’s storerooms.
Scope: Includes items like:
Spare parts.
Food stores.
Fuel oil, lube oil, and grease in tanks/drums.
Gas cylinders and cleaning chemicals.
Requirement: Similar to Part II, this is prepared specifically for the recycling facility to ensure they are aware of all consumable hazards before breaking begins.