How should a RCO respond when a beeping or pulsing alarm sounds on the RCT?

Pressing the vigilance toggle in response to a beeping or pulsing alarm on the Remote Control Transmitter (RCT) indicates that the operator is acknowledging the alarm condition, which is essential for maintaining safety and situational awareness. The vigilance toggle serves as a reminder for the operator to stay alert and actively monitor the current operation. This action helps ensure that the operator knows the machine is in a state that requires attention, potentially related to safe operations or system alerts.

Calling for assistance may be necessary in some situations, but the first response is typically one of acknowledgment and prevention, which is what the vigilance toggle facilitates. Activating the emergency stop would be a drastic measure and would be used only if the situation necessitates an immediate halt to all operations due to imminent danger. Adjusting the speed control may not address the underlying issue that triggered the alarm and could lead to further complications if not handled properly. Thus, the vigilance toggle is the correct response to ensure the operator remains engaged and ready to manage the situation effectively.