What is the term for the depth of water needed to float?

The term for the depth of water needed to float is called "draft." Draft refers to the distance from the waterline to the bottom of a vessel's hull. It is an important measurement in determining whether a vessel can safely navigate in a body of water without running aground. The draft of a vessel depends on factors such as its size, weight, and cargo capacity. Ships with deeper drafts require deeper water to float, while ships with shallower drafts can navigate in shallower waters. Pilots and captains must carefully consider a vessel's draft when planning routes and entering ports to ensure safe navigation.