ianr33
Contributor
+1 on this . . .
Was this some kind of circuit? They put in the initial jump to the ?? line but thought they could just do a visual at the end of the jump to the gold line?
Sorry for all this basic stuff . . .
look at this map of JB (Click on "resources" then "map") CaveAtlas.com » Cave Diving » United States » Jackson Blue Spring
Find the "Goodman Syphon" down at the bottom left. The tunnel in question is below the word "Syphon"
The divers (presumably) ran a line from the goldline to the line that is in this tunnel. It's not shown on the map, but this tunnel turns into sidemount country and soon comes back out to the main tunnel. The line ends tied to a rock (chicken head rock?) This rock is on the left side (going in) of the main tunnel. Gold line is on the right side. In normal good viz the gold line can be easily seen. Just beyond this rock is another white line that goes up into a rift. Sounds like the diver in question trashed the viz and got lost trying to find the main line.
This side tunnel is pretty straightforward in sidemount , imagine backmount would make a mess.