Otway Massif is a prominent, mainly ice-free massif, about 10 nautical miles (18 km) long and 7 nautical miles (13 km) wide, standing at the northwest end of the Grosvenor Mountains

Grosvenor Mountains

Grosvenor Mountains is a group of widely scattered mountains and nunataks rising above the polar plateau east of the head of Mill Glacier, extending from Mount Pratt in the north to the Mount Raymond area in the south, and from Otway Massif in the northwest to Larkman Nunatak in the SE. Discovered...

 at the confluence of Mill Glacier

Mill Glacier

Mill Glacier is a tributary glacier, 16 km wide, flowing northwest between the Dominion Range and the Supporters Range into Beardmore Glacier. Discovered by the British Antarctic Expedition and named for Hugh Robert Mill, British geographer and Antarctic historian.-See also:* List of glaciers in...

 and Mill Stream Glacier

Mill Stream Glacier

Mill Stream Glacier is a tributary glacier, about 10 nautical miles wide, flowing west between Supporters Range and Otway Massif to enter Mill Glacier. Named by the New Zealand Geological Survey Antarctic Expedition in association with Mill Glacier....

. Surveyed and named by the Southern Party

Southern Party

The Southern Party was a minor political party in the United States that operated exclusively in the South. The party supported states' rights and increased Southern cultural and regionalist activism....

 of the New Zealand Geological Survey Antarctic Expedition

New Zealand Geological Survey Antarctic Expedition

The New Zealand Geological Survey Antarctic Expedition describes a series of scientific explorations of the continent Antarctica. The expeditions were notably active in 1957-58 and again in 1958-59. The 1957-58 expedition went to the Ross Dependency and named the Borchgrevink Glacier...

 (NZGSAE) (1961–62) for P.M. Otway, who had wintered over at Scott Base

Scott Base

Scott Base is a research facility located in Antarctica and is operated by New Zealand. It was named after Captain Robert Falcon Scott, Royal Navy, leader of two British expeditions to the Ross Sea area of Antarctica...

 and was a member of this party and the Northern Party during the summer of 1960-61.