One of my favorite ADN stories was about diving in the inlet on the pipelines. It must have been featured 20+ years ago. The article talked about how clear slugs of water would sometimes move through the dive site allowing the diver to see the all around. There were huge boulders that rolled along the bottom and they were worried about some old sunken boat that could also be rolling along. The water was usually so dark they did everything by feel. Sounds like a crazy, super scary job!