Book traversal links for Safety Monitoring by a Competent Person ‹ Positioning Device Systems Up Warning Line Systems › A Safety Montioring System allows a trained person to monitor others as they work on elevated surfaces and warn them of any fall hazards. Book traversal links for Safety Monitoring by a Competent Person ‹ Positioning Device Systems Up Warning Line Systems › Resources OSHA Fall Protection Standards Staff James McQuaid Program Manager 609-258-5106 Kelly States Assistant Director 609-258-2648