160 OPERATIONAL AND EMERGENCY BILLS 



3. A safety factor is required for all lifting equipment. For example, the safety factor of 

 wire rope is five, and the safe working load for any such equipment is one-fifth of the ultimate 

 strength of the equipment when new. 



4. The crane shall be placed directly over the load being lifted to avoid sliding of the load 

 and overstressing of the hoisting equipment. 



5. The load or hook shall at all times be raised high enough to clear all objects that are 

 in the path of travel. 



6. Loads shall never be left suspended in the air while waiting or when the crane is left 

 unattended. 



7. When lowering a load, the operator shall proceed carefully and make sure that the load 

 is under control at all times. 



General Rules 



1. Cranes shall be operated only by an authorized crane operator. 



2. Only lifting materials and equipment which meet required specifications shall be used 

 for the movement of any load. 



3. Crane operators and riggers shall operate as a team. Any disagreements concerning 

 the safe handling of a load shall be referred to the rigger supervisor for a decision before 

 proceeding with the lift. 



4. Only qualified personnel (riggers) shall be permitted to hook loads to a crane. 



5. Before any load is moved, it shall be the joint responsibility of both the rigger and the 

 crane operator to be certain that all hitches have been safely made. 



6. Cranes and hitching equipment shall not be loaded beyond their rated capacity. 



7. Standard crane signals shall be accepted by the crane operator only from the rigger 

 who is responsible for the lift. Only one rigger will give signals to the crane operator on each 

 lift. In the event of an emergency , however, stop signals shall be accepted from anyone . 



8. It shall be the responsibility of the riggers and crane operators to keep personnel clear 

 of all loads. 



9. No one shall be permitted to ride on the load, a hook, or a sling. 



10. Thorough housekeeping shall be maintained at all times on decks, in the crane cab, and 

 on the catwalks. 



11. All personal injuries, no matter how slight, will be reported to the supervisor. In ad- 

 dition, any accidents that cause damage to equipment or materials, or any irregularities ob- 

 served in the operation of equipment, will be reported immediately. 



GENERAL CASUALTY INSTRUCTIONS 



1. In the event of a casualty resulting in an unbalance of atmospheric gases, all Sealab 

 personnel will remain on the emergency air breathing system until the atmosphere is brought 

 back into balance. 



2. In the event of any casualty, the bottom commander must insure that an adequate flow 

 of information be provided topside. The topside commanders must be aware of current status 

 and corrective procedures being instituted. 



