Final answer:
The SHML, or Ships Hazardous Material List, is a list of hazardous materials on a ship which is essential for safety and compliance with maritime regulations like the IMO's Hong Kong Convention.
Step-by-step explanation:
The SHML (Ships Hazardous Material List) is B) a list of hazardous materials on a ship. This list aims to identify and catalog all hazardous materials that are present on a vessel. The SHML is a crucial document for enhancing safety on board ships and for environmental protection. It's used by ship operators to keep track of hazardous materials, ensuring they are correctly handled and stored. Moreover, the SHML is necessary for compliance with regulations such as the International Maritime Organization's (IMO) Hong Kong International Convention for the Safe and Environmentally Sound Recycling of Ships.