What is essential to know when passing under a river bridge?

When passing under a river bridge, knowing the clearance height under the bridge is crucial for safe navigation. This height indicates the maximum vertical distance between the water surface and the bridge structure above. If a vessel's height exceeds this clearance, there is a risk of collision with the bridge, which can cause significant damage to both the boat and the bridge itself.

Understanding the clearance height helps boaters determine whether they can safely navigate under the bridge without altering their course or risking an accident. Having this information readily available is vital for maintaining safety on the water and ensuring compliance with navigation laws. This aspect of boating safety is directly tied to vessel design and waterway management.

While other factors, such as current speed or the type of bridge, are important for overall safe boating, they do not directly relate to the immediate risk of collision posed by insufficient clearance. Toll charges are relevant in contexts involving bridge access but do not affect the physical navigation beneath the bridge.