The prevention of dropped objects is an important component of safeguarding personnel, property and the maritime environment. This concise book has been developed to provide safety professionals and practitioners with specific guidance and criteria on the development, implementation and management of dropped object prevention programs which corresponds to a growing industry-wide development to mitigate and eliminate the hazards imposed by dropped objects. This book relates to the Class requirements for an onboard dropped object prevention program to be implemented on offshore assets, and provides the design requirements for equipment primary securing, secondary retention methods and securing for specific equipment, etc. This book is intended for use by offshore installation Owners, Operators, and Companies whose intention is to prepare for, and ultimately apply for optional Class notations highlighting the installation's compliance with dropped object safety management. For the benefit of context, the book uses the provisions which relate specifically to the DOPP and DOPP+ notations.