What are the standard hand signals used to indicate 'emergency stop' and 'dog everything' in crane operations?

The standard hand signal for "emergency stop" in crane operations involves extending both arms horizontally to the sides with palms facing down, and then moving the arms rapidly back and forth. This signal is universally recognized and indicates an immediate cessation of all crane movements due to a hazardous situation. The standard hand signal for "dog everything," also known as "dog off all brakes," involves holding both fists in front of the body with thumbs pointing towards each other and then rotating the fists around each other. This signal instructs the crane operator to engage all brakes and locking devices, effectively securing the crane and preventing any further movement. These signals are crucial for clear communication between the signal person and the crane operator to ensure safe operation. Any deviation from these standard signals can lead to confusion and potentially dangerous situations, so their consistent and accurate use is paramount.