The DIR leadership has been pretty good at explaining why we do things a certain way. It's less good at explaining that alternative approaches have already been tried and rejected years ago. Then these ideas resurface every few years and around we go again, often playing a game of "telephone" with second- and third-hand information. It would be helpful to document not just the "why" but also the "why not" as the reasons aren't always obvious to those with limited experience, or who only do a single type of diving. Maybe we need something like a DIR wiki? Although it's difficult to get the real experts to devote much time to writing about the basics.