The deaths of two heli-skiers in an avalanche here has generated safety discussions among firms conducting the tours and among backcountry skiers.

The March 13 avalanche buried Alaska Heliskiing guide Rob Liberman and client Nick Dodov under six to eight feet of snow. Recent autopsies determined both died of asphyxiation. The slide occurred as Dodov was descending a Takhin Ridge slope and Liberman was standing off to one side. Liberman and three other clients had…