What is the primary use of direction finding in navigation?

The primary use of direction finding in navigation is to locate other vessels or hazards. Direction finding refers to techniques and tools that help navigate by identifying the direction from which radio signals are received. This capability is crucial in marine navigation as it enables a vessel to determine the position of other ships and potential hazards in the area, thereby promoting safety at sea.

By using direction finding systems such as radar or VHF radio direction finders, navigators can pinpoint the location of objects or vessels, which is vital for avoiding collisions and ensuring safe navigation, especially in crowded or hazardous waters. This navigational technique enhances situational awareness and allows mariners to make informed decisions about their course and position.

Other alternatives, such as measures of speed, course maintenance, and distance to shore, are typically determined by different navigational means and would not be the primary focus of direction finding.