The official source of policy is the NWS Directives System.

Here is a concise listing of the Directives referenced in other parts of this course.

Most of the chapters are in Section 10 - Operations and Services but covers other functional areas including:

• Functional Area 20: Training and Education
• Functional Area 30: Maintenance, Logistics and Facilities
• Functional Area 60: Information Technology
• Functional Area 80: Science and Technology

This Google Drive Folder contains the Hydrologic Services-Related directives and instructions for ease of access.