What A Pleasent Dive - OFD1 Gothic Sump Downstream

Watch Tobias Silver (the sump addict) go down a particularly lovely dive in the Gothic downstream sump in Ogof Ffynnon Ddu. This is one of his go too or "classic" dives and he talked about both the lovelyness of this dive, and the dreaded gas manegment of upstream and downstream dives!