This book is specific to the maritime industry, it is the first in a series of books by the author who is also writing guidance for the Aviation, Logistics, and Railway sectors. TOX247 has divisions dedicated to each of these sectors. The Maritime sector has specific and unresolved issues for substance management at sea. Membership and even regulatory bodies are providing woolly guidelines and then leaving shipping lines to set standards, not currently being met. Managing substances ashore is not the same as at sea, crew in rotation are not properly managed in this subject before they board vessels, often bringing unresolved hidden threats and high-risk employees into a high-risk environment. At TOX247, we address this issue by providing specific direction through proven policies, practices, processes, and procedures. This book is not the complete answer to workplace substance management in the maritime sector alone. It must be read in conjunction with all TOX247 Academy publications and courses.