When hoisting personnel, a telescopic crane must have an anti-block prevention system, a boom angle indicator, and what else?

When hoisting personnel with a telescopic crane, it is crucial to have a boom length indicator as part of the safety equipment. This indicator provides the operator with vital information about the length of the boom that is extended, which is essential for maintaining the crane's stability and ensuring that the load does not exceed the crane's rated capacity. Having accurate information about the boom length helps the operator make informed decisions about lifting operations, especially when personnel are involved, as safety is the top priority in such tasks.

The boom length indicator works in conjunction with other safety devices, like the anti-block prevention system and boom angle indicator, to enhance the overall safety of the hoisting operation. By ensuring that all of these systems are operational and properly understood by the operator, the risk of accidents can be significantly minimized, thereby ensuring a safer work environment for personnel being lifted.