Rock climbing is remarkably similar. When a climber begins up a route the standard exchange with their belayer (the person managing the rope and keeping them alive in a fall) goes something like
A: "Belay on?"
B: "Belay on"
A: "Climbing"
B: "Climb on"
Then the climber begins.
It's interesting to me that highly regulated and totally unregulated activities have evolved extremely similar processes. I suppose having your life on the line is a good motivator to follow best practices.
