Title: +038=627.001-##001T_03-Fasadevasksystem NorAcon - International Code of Practice (ICOP).pdf
2.11.9.1 An efficient communication system should be established between all rope access technicians and, where necessary, to third parties (e.g. sentries or the control room, if offshore). This should be agreed and set up before work starts and should remain effective for the whole of the time that people are at work.