Originally Posted by lonewolf210
Well your using the term Island of safety wrong... They are a place where it would be extremely unlikely to be hit by an avalanche such as a ridge line between to gullies or certain convection in a hill. A better why to put it is they are areas where the natural path of a slide would be contained away from them by the terrain. Trees are not that. ...
Hmmm...let's go back to the CAIC: "...They also used areas with sparse trees as Islands of Safety. Traditionally Islands of Safety are areas where, if there is an avalanche, people inside that area will not get caught by the slide debris. Trees on a 40-degree slope need to be very close together (close enough that you cannot easily ski through them) to offer a significant degree of safety. " http://avalanche.state.co.us/caic/acc/acc_report.php?acc_id=526&accfm=inv
In other words, I used "islands of safety" in the same way as the CAIC. You may think that I, and the CAIC, are wrong. For me, I would again suggest that the fact that the UAC and the CAIC and Dale Atkins are speaking in a consistent manner in this regard, and you are trying to contradict them, might give many give you cause to reflect.
In real life, you might even look at real terrain management issues and see how this plays out. For instance, on my rear retaining wall I have a clear view of a good number of slide paths. The snow there for a variety of reasons doesn't form deep hard slabs very often. Well, what type of snowpack do trees actually do best anchoring? Page 73 of that Tremper thing that I'm accused of not reading, in one of the personal attacks that seem to be the mother's milk of some posters on here, notes that anchors hold hard slabs better than soft slabs. So, to add to that: relatively thin snowpack, big temperature swings, etc. -- why are so many of the slide paths that I can look at surrounded by very mature conifers that don't have little trees growing in between too often? The trees meet what you think would be safe spacing, Lonewolf -- stand or hit? By the standards of the CAIC and the UAC and Atkins, extreme caution would be advised a good bit of the time. And, actually, in real life, not surprisingly, they have it right.