Travel downstream from Emerald to check visibility and flow conditions. If conditions allow, continue exploring a lead previously worked by Lais and Deschamps.
Single stage each and one tow scooter.
Surface observation of Cheryl indicated clear water with a slight green tint. The sun was in just the right position so that we could see straight to the sand bottom from the platform. Emerald also displayed a slight green tint, however from 100 feet of depth, we could see the tops of the trees surrounding the sink. Once below Emerald, noticeable syphoning flow was observed. Moderate flow was also noticed in conduit between Cheryl and Emerald. Approximately 25 feet past the T, cold tannic water was discovered to occupy the bottom half of the conduit. The line was approximately submerged 2-4 feet in the tannic, with clear water above. The interface depth was approximately 145-150 ft depth. 100 ft downstream from the T, milky-white water was encountered on top of the tannic water below. Dive was aborted due to poor visibility, and increasing syphoning conditions.