Cathedral Conditions

[jj1987]

There is a nice big deck going down to the water. A headpool about 25 by 50 feet, usually covered in duckweed. the floor of the headpool slopes down toward the entrance, about 30'. Just inside is a deco chamber. There are several lines going straight down to about 100'. At one time, they were marked for upstream and downstream, but I didn't see any last trip. This is the reason for going with someone that has been there before.

There are two downstream lines. One goes to Falmouth, the other goes to Jewell sink. If there is much current, these could be on-way dives!

The main upstream line has a bunch of clips on it to hang deco bottles. At around 110', you go under the sinkhole wall, and start to level out. The line goes up and down over hills, varying from 130' to nearly 200'. On your first dive, you probably won't get much past 150'. Trimix is recommended. The tunnel is huge, and I have only been able to see both walls a couple of times, when the visibility was very good. It never gets over 50', and last month was only 30'.

I have heard that the line is buried in places upstream. It was the same downstream on my last last trip.

Can we dive here at night? Might make a nice friday afternoon/night dive. How far until you get deeper than 150?

[JahJahwarrior]

Water levels at Falmouth are way low, the downstream side isn't connected to the Cathedral sink side right now. Water at Falmouth wasn't too pretty, only a few feet, but that doesn't mean the cave is that low necessarily. Other caves in that area are divable with 20-30 feet of viz.

[FW]

Can we dive here at night? Might make a nice friday afternoon/night dive. How far until you get deeper than 150?

Yes, you can dive at night, but it ill be dark in the cave

IIRC, it is a little over 1000' before you hit 150' depth.