Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
2.11.9.2 It is recommended that a radio system or suitable alternative is used for communication purposes, unless the area of work is such that all those involved (including any sentries) are always visible to each other and within audible range. The communication system should allow direct and uninterrupted communication between the rope access safety supervisor and the work team. Potential problems, e.g. noise; radio interference; other work teams’ communication systems; weather, should be taken into account. It is preferable for the supervisor to have direct sight of the work team.2.11.9.3 Hand or voice signals are liable to be misunderstood. Therefore, any special signals should be agreed and well-rehearsed before work begins. These should include a method, e.g. a sign or a signal, to enable the rope access technician to summon help, should other established methods of communication fail.© IRATA InternationalPart 2: page 65 of 682014-Jul-01