I’m a huge believer in the "dive against debris" idea, and have been using a convenient method to extract a significant amount of trash and debris from a local quarry. I’ve called it a Debris Collection Sled, and it has proven to be very useful in collecting and removing large quantities of debris in just one dive. No sure if anyone else is using a similar setup (didn’t find anything in Google Images), but thought it might come in handy for anyone committed to cleaning up underwater environments. Check out the attached visual. Al