9.The load must be allowed to pass over personal. Extraneous passers-by should not be allowed to linger near the path of the load , and those directly concerned with the operation should stand in a vantage point which is well outside this area.
10.Operations such as changing the gearing, or twinning two systems, must only be performed under the direct supervision of the OOW , who should check the manuals or consult the chief officer if he is not sure of the procedures or operational requirements.
11.Any limit switches and other automatic control