The boom angle indicator provides information relative to what?

The boom angle indicator is essential for providing operators with information about the angle of the boom relative to horizontal positioning. This is crucial for ensuring safe operations, as knowing the boom angle helps the operator understand the reach and lift capabilities of the crane at any given position. When the angle is measured concerning the horizontal plane, it allows for accurate calculations and assessments of load charts and helps prevent overloading and instability. If the boom is angled too steeply or laid out too flat, it can significantly impact the crane's load lifting ability and stability, which is why this information is vital for safe crane operation.