Hydrostatic Release Units (HRUs) allow your liferafts to launch automatically should your vessel sink. They only work if they are fitted correctly.

A correctly fitted hydrostatic release unit (HRU) will also allow you to quickly launch liferafts manually in an emergency using the senhouse slip.

This video will show you the principles of fitting a hydrostatic release units (HRUs) correctly as well as their internal operation. Understanding how hyrdostatic releases work helps you to fit them correctly and, ultimately, to keep yourself safe on the water.