Raising an SOS from wherever you are, and the guarantee of being found fast is 100% achievable and practicable.
The GRWM Regulations, part 2, Guideline 3.1 deal with risks associated with remote or isolated work. It is a PCBU’s responsibility to manage the risk. I think the HSWA guidelines are fairly prescriptive, but as we all know… all the guidelines are fairly open to interpretation, but two things are very clear;
This fatal incident highlights not only the importance of training users in safety equipment and processes for use, but also for us, highlights how a man down alarm in situations where workers are out of line of sight of each other would instantly alert others to an incident.