From 03.08.2009 to 25.08.2009, a group of 25 Moscow based cavers worked in Caucasus, Arabika. The main project was diving in Ilyukhina system (total depth -1253m) at the depth of -720m, climbing in a branch at -800m, and -500, working in cave Ice Dragon (-150m and goes on, entrance at 2290m), and the exploration of new surface objects. The dived syphon is with parameters (125m,-30m), and continues underwater. More here.