Detailed text transcripts for TV channel - MSNBC - 20180708:13:38:00
When you go down certain depths or unable to see, you can get tangled up in things. they have a line that they must hold on to. i imagine given the very narrow nature of these pathways, it's got to just be a very narrow, fixed line. would it be a rope line they're hanging on to, given they can't even see where they are going. >> yeah. following the line, a lot of people who are experienced scuba divers, that's where they have problems in cave training classes. and they make mistakes. and you do it again the next day and you do it again the next day. these guys don't have that luxury. they have...
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