This document provides information on ship and port security training (STSDSD) for seafarers with designated security duties. It discusses the history and development of the International Ship and Port Facility Security (ISPS) Code in response to terrorist attacks. It outlines the structure and purpose of the ISPS Code, current security threats, and definitions of security levels. It then details the security responsibilities of contracting governments, ship owners, ships, ports, and security officers. It provides an overview of key security documents, assessments, equipment, and actions required at different security levels.