The tree limb on the left side is good for the primary tie. Looks like some backup lights need to be secured as well.
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It's just an' old habit. We did cavern and basic cave at p1, at the time we did the classes the water in the basin was that pea soup green so our instructor had us tying off to the steps. I'm sure there's a better way to do it, I just haven't figured it out yet. But i'm always open to suggestion
Another option for securing backup lights is to tie a loop of surgical tubing around the harness. It's stretchier than inner tube, if you have arthritic hands like mine that don't like pulling hard on things, but it's tacky enough and wide enough that the lights don't slip out of it.