How many lights indicate a command to lower slowly?

A command to lower slowly is typically indicated by a specific number of lights designed to ensure clear communication among operators and crew members. In most hoisting operations, a signal using four lights specifies the command to lower a load slowly. This is a standardized signaling procedure, as it is crucial for maintaining safety and coordination during lifting operations.

The use of multiple lights helps to differentiate commands clearly, reducing the potential for misunderstandings. In contrast, a single light or fewer than four lights may represent other commands, such as stopping, lowering quickly, or another specific function. Using four lights for the "lower slowly" command ensures that it stands out and is recognized immediately by all involved. This clear distinction is vital for safety in environments where heavy lifting occurs.