U.S. Ocean Mapping Strategy: Office of Coast Survey Contributions The Office of Coast Survey's plan for contributions to a National Ocean Mapping Strategy outlines the commitment and approach to fulfilling the core mission of surveying and nautical charting, while supporting broader societal needs for comprehensive seafloor mapping. This strategy, detailed in the document revised in July 2020, aligns with the national and international emphasis on understanding marine environments for the Blue Economy and conservation efforts. Main Chapters Overview: Introduction Goal I - Optimize Marine Highway Infrastructure Goal II - Map U.S. Waters to Modern Standards Mandates and Authorities Technology and Innovation Preface: ATP 2-01.3 constitutes current doctrine on how to systematically evaluate the effects of significant characteristics of the operational environment (OE) for specific missions. This publication describes how the commander and staff examine mission variables to understand how these variables may affect operations, discusses intelligence preparation of the operational environment (IPOE) as a critical component of the military decision-making process, and facilitates a common understanding, foundational concepts, and methods of the IPOE process. Important Changes: Change 2 to ATP 2-01.3 aligns the publication with updates to FM 2-0, Intelligence, and JP 2-0, Joint Intelligence. It updates content, eliminates obsolete information, and modifies all instances of intelligence preparation of the battlefield to intelligence preparation of the operational environment, including the title of the publication. Chapter Appendices: Each chapter appendix provides additional insights and tools for intelligence preparation of the operational environment, including threat characteristics for regular, irregular, and hybrid threats, IPOE cyberspace considerations, and a comprehensive glossary and reference list to support the IPOE process.