Continued exploring a section beyond Sump 1 at −1,410 m and reached the next sump (Sump 2 – "Blue Lake") at depth claimed to be −1,840 m. The depth of that point according to the subsequent Ukr.S.A.
Continued exploring a section beyond Sump 1 at −1,410 m and reached the next sump (Sump 2 – "Blue Lake") at depth claimed to be −1,840 m. The depth of that point according to the subsequent Ukr.S.A.