About the Study Guide

You are looking at a preview of what’s in the timed Water Rescue for the First Responder Course. Feel free to look around, but you’ll need to register to begin progress toward getting your Water Rescue for the First Responder Course Completion Certificate.

Learn More Register for the Course


An eddy is a current created behind a rock or other obstruction, such as a house or car, that flows in a circular upstream direction.

  • The flow of the eddy is opposite to the direction of the main laminar flow.
  • The visual separation between an eddy and the main current is the eddy line. The line is narrow closest to the obstruction and becomes wider downstream.