Mount Hassage is a prominent isolated mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 (1,120 m) located 12 nautical miles (22 km) southwest of Mount Horne

Mount Horne

Mount Horne is a highest and most prominent mountain in the Quilty Nunataks, standing 12 nautical miles east-northeast of Mount Hassage in Palmer Land. Discovered by the Ronne Antarctic Research Expedition , 1947–48, under Ronne, who named it for Bernard Horne of Pittsburgh, PA, who furnished...

 in Palmer Land

Palmer Land

Palmer Land is that portion of the Antarctic Peninsula which lies south of a line joining Cape Jeremy and Cape Agassiz. This application of Palmer Land is consistent with the 1964 agreement between US-ACAN and UK-APC, in which the name Antarctic Peninsula was approved for the major peninsula of...

. The feature was discovered by the Ronne Antarctic Research Expedition

Ronne Antarctic Research Expedition

The Ronne Antarctic Research Expedition was an expedition from 1947-1948 which researched the area surrounding the head of the Weddell Sea in Antarctica.-Background:...

 (RARE) under Ronne, and marks the southwest extremity and turnabout point of the RARE plane flight of November 21, 1947. Named by Ronne for Charles Hassage, ship's chief engineer on the expedition.