east, and 8 km wide between Cherepish Ridge to the north and Christoff Cliff to the south. The summit Great Needle Peak () rises to 1680 m, and was first ascended and GPS-surveyed by the Bulgarian mountaineers Doychin Boyanov, Nikolay Petkov and Aleksander Shopov on 8 January 2015. Other main peaks are Levski (1430 m), St. Ivan Rilski Col (1350 m), Helmet (1254 m), Serdica (1200 m), Vihren (1150 m), Ongal (1149 m), and Plovdiv (1040 m). Other first ascents: Ongal Peak and Komini Peak (774 m) by L. Ivanov from Camp Academia on 21 December 2004, and Plana Peak by D. Boyanov, N. Petkov and A. Shopov on 8 January 2015. Delchev Ridge Delchev Ridge is 10 km long between Devin Saddle to the west and Renier Point to the east. The summit Delchev Peak () rises to 940 m, other main peaks are Ruse (800 m), Asen (800 m), Peter (800 m), Kuber (770 m), Elena (700 m), Spartacus (650 m), Yavorov (640 m), and Paisiy (550 m). Mapping British mapping of the mountains in 1968, Spanish mapping in 1991, Omega Foundation mapping in 2004, Bulgarian mapping in 2005 and 2009 from topographic surveys in 1995/96 and 2004/05. S. Soccol, D. Gildea and J. Bath. Livingston Island, Antarctica. Scale 1:100000 satellite map. The Omega Foundation, USA, 2004. L.L. Ivanov et al. Antarctica: Livingston Island and Greenwich Island, South Shetland Islands (from English Strait to Morton Strait, with illustrations and ice-cover distribution). Scale 1:100000 topographic map. Sofia: Antarctic Place-names Commission of Bulgaria, 2005. L.L. Ivanov. Antarctica: Livingston Island and Greenwich, Robert, Snow and Smith Islands. Scale 1:120000 topographic map. Troyan: Manfred Wörner Foundation, 2010. (First edition 2009. ) L.L. Ivanov. Antarctica: Livingston Island and Smith Island. Scale 1:100000 topographic map. Manfred Wörner Foundation, 2017. See also Geographical features on Livingston Island Antarctic Place-names Commission St. Kliment Ohridski Base Camp Academia Tangra 2004/05 Expedition Bansko Peak References Notes Sources J. Stewart. Antarctica: An Encyclopedia. Jefferson, N.C. and London: McFarland, 2011. 1771 pp. D. Gildea. 2003 – Omega Livingston Island GPS Expedition. Antarctic Mountains: Climbing in Antarctica. Antarctica: Livingston Island. Climb Magazine, Issue 14. Kettering, UK, April 2006. pp. 89–91 L. Ivanov. Livingston Island: Tangra Mountains, Komini Peak, west slope new rock route; Lyaskovets Peak, first ascent; Zograf Peak, first ascent; Vidin Heights, Melnik Peak, Melnik Ridge, first ascent. The American Alpine Journal, 2005. pp. 312–315 L. Ivanov. General Geography and