Avalanche safety [Sports Tech]

OVER THE LAST 30 years or so my life has revolved around outdoor sports. However, my outdoor career almost came to an abrupt end before it had even started. Rewind 30 years, and a young geology student is clambering up a snow-laden gully in the Cairngorms on his first ever winter mountaineering trip. Near the top of the gully there´s a sudden ´crack!´, and the entire snow slope breaks away and starts tumbling and bouncing downhill in the skier and mountaineer´s worst nightmare – an avalanche.