activity of Speleoklub Gliwicki (SG), concentrated mainly in the part of the zone which had been little explored by SCOF. In 1979 the activity took place in the lower parts of the massif. Several caves were discovered, including Sima Profunda (-190), Sima de Nieve (-98) and Sima Cantolimpou (-76). Entrance series of Sima de los Desvios (F-3) were also searched in Sima de Cembavieja (Cem.) members of Seccion de Espeleologia Ingenieros Industriales (SEII) attain the depth of -350 m, while in Sima de la Porra la Altiquera (H-11) cavers from GEP reach -418 m. 1980 Exploration was continued in the caves discovered earlier. The results are the deepening of Sima de los Desvios from -280 to -315 m, Sima Profunda from -190 to 204 m and Sima Cantolimpou from 76 to -128 m. Also visited were Sima de la Torre de los Traviesos o de los Organos (A-1). Near the limit of the zone, on the side explored by the English, members of Oxford University Cave Club (OUCC) discovered Sima Conjuarto (1/6). Since 1981 for many years, because of the situation in the country, Polish teams were not coming to the Picos. Spaniards from SEII attained -550 m in Sima de Cembavieja (Cem.). This was the first so deep a cave in this part of the massif. 1982 In Sima de Cembavieja (Cem.) SEII and OUCC reach the final sump at the depth of -703 m. Members of OUCC descend to -520 in Pozu Jorcada Blanca (F2), which lies next to the limit of the Polish zone. 1983 The English reach the final sump in Pozu Jorcada Blanca (F2) at the depth of -594 m. 1984 After a long break Poles reappear in the Picos. Their penetration into Sima de la Torre de los Traviesos o de los Oroganos, started in 1980, ends at the level attained by the French (-416).

THE DEEPEST CEVES IN POLISH EXPLORATION ZONE AND ITS VICINITY NAME ENTRANCE SYMBOLS DEPTH LENGTH HORIZONTAL EXTENT YEARS, CLUB, RESULT OBJECTS SITUATED IN THE POLISH ZONE Sistema del Jou de la Canal Parda (Pozu del Picu de los Asturianos - Sima de la Torre de los Traviesos o de los Organos) A-30 (0) A-24 (-13) A-25 (-14) A-1 (-22) -903m 4401m +ca. 450m 760 m 1974, SCOF, -330 in A-1 1975, SCOF, -416 in A-1 1989, SKG, -260 in A-30 1991, SCW, -552 in A-30 1994, SCW, -726 in A-30 1995, SCW, connection of A-1 with A-30 1996, SCW, -903 Pozu del Porru la Capilla A-11 -863m 1593m 440 m 1984, SG, -180 1986, STJC, -400 1987, SG, -863 Sistema del Canalon de los Desvios F-18 (0) F-17 (-24) F-15 (-36) -501m 1597m +ca. 50 m 202 m 1994, SCW, -501 in F-17 /F-18 1995, SCW, connection of F-15 with F-17/F-18   G-13 -429m 623 m 82 m 1989, SGKWW, -429 Red de los Barrastrosas G-7(0) G-4(-48) -315m ? 145 m 1972, SCOF, -215 in G-7 1973, SCOF, -315 in G-7 and connection with G-4 Sistema de los Desvios F-3 -315m ? ? 1973, shepherd, -100 1975, SCOF, -280 1980, SG, -315 SCP 134 -240m ? 42 m 1984, SCP, -38 1985, SCP, -157 1986, SCP and KKS, -240 Sima Profunda -204m ? ? 1979, SG, -188 1980, SG, -204 OBJECTS SITUATED IN THE NEIGHBOURING ZONES Sistema Cembavieja SCP 111(0) Cem. (-107) -810m ? ? 1974, GMT, -100 in Cem. 1977, SEII & GEP, -310 in Cem. 1979, SEII, -550 in Cem. 1982, SEII & LUSS, -703 in Cem. 1984, SCP, -300 in SCP 111 1985, SCP, connection of SCP 111 with Cem., -810 Sistema Conjuarto 2/6(0) -655m 2435m 385m 1980-85, OUCC, -452 in 1/6 & -80 in 2/6 1986, OUCC, 655 in 1/6 & connection with 2/6 Sistema Jorcada Blanca (Pozu Jorcada Blanka - Pozu les Perdices) F2(0) F7(-90) -594m ? 365m 1982, OUCC, -520 in F2 1983, OUCC, -594 in F2 1984, OUCC, connection with F7 Pozu del Redondo F20 -582m ? 395m 1982, OUCC, -382 1986, OUCC, -582 Sima de la Porra la Altiquera H-11 -418m ? ? 1972, SCOF, -73 1974, GEP, -350 1979, GEP, -418 KKS - Katowicki Klub Speleologiczny, OUCC - Oxford University Cave Club, Oxford, UK, SCW - Spelpoclub Wroclaw, LUSS - Lancaster University Speleological Society, Lancaster, UK, SG - Speleoklub Gliwice , SGKWW - Sekcja Grotolazow Klubu Wysokogorskiego Wroclaw, SCOF - Speleo Club Orsay Faculte, Orsay, France, SCP - Espeleo-Club de la Universidad Politecnica de Valencia, Valencia Spain, STJC - Sekcja Taternictwa Jaskiniowego Czestochowa, SEII - Seccion de Espeleologia Ingenieros Industriales, Madrid, Spain, GEP - Grupo Espeleologia Polifemo, Oviedo, Spain, GMT - Grupo de Montana Torreblanca, Oviedo, Spain