EmptyTank
Contributor
I realize at first glance many will answer none, but bear with me here. A newly certed diver only has a cursory introduction to navigation. So s(he) goes to the local quarry or pond and does a bunch of navigation exercises after reading more in depth material. Perhaps a diver from a more tropical climate moves up north and starts to dive in some colder conditions and goes to buy a drysuit but doesn't take a class however did watch instructional videos and youtube examples. In the early days of scuba, it was largely self taught or perhaps a group of people got together and experimented with necessarily taking a class. So, how many of you went and learned a new more advanced scuba skill entirely on your own after perhaps seeing it done by another diver or reading about it?