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...Jim persons jimpersons safetypride com hand signals for crane operations the following are most commonly used directing lifting some special may require adaptations of these basic when using signal be sure operator can see you and that both understand all in charge an important operation co workers lives depend on your skills a wrong could cause serious injury or possible death think safety hoist extend right arm straight out raise forearm to vertical forefinger pointing up then move small horizontal circle lower downward down boom fingers closed thumb upward swing away from body point with finger direction stop extended wrist bent palm open emergency rapidly left travel tracks crawler cranes only use fists front making circular motion about each other indicate forward backward dog everything clasp hands load flex as long movement is desired rest us job stay alert working near any avoid under moving clear counterbalance always remember s vision obscured guard own...