Class 1 (Chief Engineer) Engineering Management 📅 Mar 2025

Exam Question

The HNS Convention is expected shortly to come into force. Explain the following in respect of this convention.

(a) List and give examples of substances covered under this convention

(b) Types of pollution and subsequent losses or damages which can come under this (5)

(c) Why would an oil products tanker probably require having certificates under all 3 conventions i.e., CLC, Bunker and HNS.

Reference Answer

The International Convention on Liability and Compensation for Damage in Connection with the Carriage of Hazardous and Noxious Substances by Sea, 2010 (the 'HNS Convention'), is a critical international instrument designed to establish a comprehensive liability and compensation regime for incidents involving HNS cargoes. Its primary objective is to ensure that adequate, prompt, and effective compensation is available to persons who suffer damage caused by such substances.
### (a) Substances Covered under the HNS Convention
The HNS Convention has a broad scope, covering a wide array of substances that pose a threat to human health and the marine environment. The definition of HNS is linked to various existing IMO conventions and codes. The main categories, with examples, are:
* **Oils (as cargo):** This category includes crude oil, fuel oil, heavy diesel oil, and lubricating oil, but only when carried as cargo on board a ship. This covers non-persistent oils not covered by the Civil Liability Convention (CLC).

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