those are the three things you need to have with you. >> the beacon. >> we put on one of these and turn them out so they're transmitting. later in the day if you get buried in an avalanche i'll be able to set mine to receive, pick up your signal and locate you. >> reporter: the probe and shovel. >> this is a three-meter probe pole. what this allows me to do once i get your general location with the beacon i can pinpoint you with this probe and then use the shovel to dig down to the tip. >> reporter: this fourth item can keep you above the rampaging snow threatening to bury you, the air bag pack. we dug a three-foot-deep hole in the snow to simulate what an avalanche victim might be trapped. our plan, to send ethan green up the mountain with his beacon in receive mode to try to pick up my signal from the hole where i will wait for a rescue. our producer puts the finishing