According to ENSA's research, how effective are break knots on hard, icy glaciers?

The effectiveness of break knots on hard, icy glaciers is significantly influenced by the presence of adequate soft snow. In icy conditions, break knots can have limited gripping ability because they rely on the knot's ability to "bite" into the material to create friction. Without soft snow to enhance this grip, the knots may slip or fail to hold, compromising safety during a rescue operation or climbing scenario. Thus, the performance of break knots in these specific conditions can be deemed ineffective without the necessary soft snow to provide sufficient friction and security. Ensuring that the environmental conditions are right is crucial for the successful use of break knots in rope rescue scenarios on glaciers.