What potential risk does a strong current pose during navigation?

A strong current poses a significant risk during navigation because it can cause loss of control of the vessel. When navigating through areas with strong currents, the water's flow can significantly affect the boat's handling. This can lead to difficulties in steering and stability, making it challenging for the operator to maintain the intended course. The force of the current can push the boat off course or even into dangerous areas, creating hazards such as collisions or grounding.

While increased travel time, decreased visibility, and reduced engine efficiency may be issues during navigation, they do not directly relate to the immediate risk of losing control over the vessel. The primary concern is the ability of the operator to manage the boat safely in challenging water conditions, where a strong current can swiftly change the dynamics of navigation.