dumpsterDiver
Banned
- Messages
- 9,003
- Reaction score
- 4,652
- # of dives
- 2500 - 4999
I answered "how far I can see hand signals" but that's really only true in "low viz" situations. In blue water, viz is just how far I can see things, period. If I'm at 70 feet and I can see the boat (and know it's a boat) for example, then viz is 70+ feet. If I'm 20 feet away and I can see my buddy is there but can't see what he's doing specifically, viz is <20 feet.
this is not correct. Looking upward with the sun shining can allow you to see a boat on the surface much further than "the visibility".
Generally visibility is referenced to mean horizontal unless otherwise stated. i estimate visbility as the distance I can reasonably clearly see a diver. In 70 ft visibility, i can sometimes see the sun shining on the surfce from 170 ft depth