Hersilia Cove is the 650 m wide cove indenting for 800 m the north coast of Rugged Island in the South Shetland Islands, Antarctica west of Herring Point.
Hersilia Cove is centred at 62°37′29.5″S61°12′31″W / 62.624861°S 61.20861°W (US mapping in 1821, British mapping in 1943 and 1968, Argentine mapping in 1958 and 1980, Chilean mapping in 1971, detailed Spanish mapping in 1992, and Bulgarian mapping in 2005 and 2009).
The cove was named in February 1820 by Captain James Sheffield, Master of the brig Hersilia, the first American sealer known to have visited the South Shetlands. It was the starting point of Antarctic sealing south of 60° south latitude, when the ship Espirito Santo with English crew under Captain Joseph Herring and chartered in Buenos Aires arrived to the cove on Christmas Day of 1819.
Rugged Island is an island 3 miles (4.8 km) long and 1 mile (1.6 km) wide, lying west of Livingston Island in the South Shetland Islands. Its surface area is 10.4 square kilometres (4.0 sq mi). The island's summit San Stefano Peak rises to 256 metres (840 ft) above sea level. Rugged Island is located at 62°38′S61°15′W. Rugged Island was known to both American and British sealers as early as 1820, and the name has been well established in international usage for over 100 years.
Svishtov Cove is a 2.19 km wide cove indenting for 1.48 km the northwest extremity of Ray Promontory on Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. it is entered southwest of Essex Point and northeast of Start Point.
Cape Sheffield is a cape forming the northwest extremity of Rugged Island in the South Shetland Islands, Antarctica. It was named for Captain James P. Sheffield, Master of the brig Hersilia of Stonington, Connecticut, in 1819–20 and 1820–21, the first American sealer known to have visited the South Shetland Islands. In 1819–20 he took 8,868 sealskins from headquarters at Rugged Island.
Ugain Point is the point on the west coast of Rugged Island in the South Shetland Islands, Antarctica separating Smyadovo Cove to the north and Bogomil Cove to the south. Situated 1.76 km north-northwest of Benson Point, 970 m north of Kokalyane Point and 1.55 km south of Cape Sheffield.
Bogomil Cove is a 970 m wide cove indenting for 770 m the west coast of Rugged Island off the west coast of Byers Peninsula of Livingston Island in the South Shetland Islands, Antarctica. It is entered north of Kokalyane Point and south of Ugain Point.
Smyadovo Cove is a 900-meter wide cove indenting for 850 m the west coast of Rugged Island off the west coast of Byers Peninsula of Livingston Island in the South Shetland Islands, Antarctica. Entered north of Ugain Point and south of the southwest extremity of the small peninsula forming Cape Sheffield. Part of the cove's interior and entrance is occupied by Toledo Island and Prosechen Island.
Chiprovtsi Point is a point projecting 400 m (440 yd) northwestwards from the north coast of Rugged Island off the west coast of Byers Peninsula of Livingston Island in the South Shetland Islands, Antarctica, and forming the east side of the entrance to Nishava Cove. It is extended further 400 m (440 yd) northwestwards by the group of Chiprovtsi Islets, which are centred at 62°36′52″S61°16′09″W and named in association with the point.
Herring Point is a point on the north coast of Rugged Island off the west coast of Byers Peninsula of Livingston Island in the South Shetland Islands, Antarctica forming the east side of the entrance to Hersilia Cove.
Raskuporis Cove is the 1.77 km wide cove indenting for 700 m the south coast of Byers Peninsula on Livingston Island in the South Shetland Islands, Antarctica. Entered west of Sevar Point and east of Devils Point, and connected to Osogovo Bay to the northwest by the 20 m wide passage of Hell Gates.
Ograzhden Cove is the 680 m wide cove indenting for 550 m the northwest coast of Ray Promontory, part of Svishtov Cove in Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. The cove is entered south of Essex Point and north of Kardzhali Point.
Essex Point is a point at the northwest end of Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. It forms the west side of the entrance to Barclay Bay and the northeast side of the entrance to Svishtov Cove, and is surmounted by Drong Hill.
Benson Point is the ice-free headland forming the southwest extremity of Rugged Island in the South Shetland Islands, Antarctica. It is a northwest entrance point for Morton Strait. The area was known to early 19th century sealers.
Window Island is a small ice-free island off the north coast of Ray Promontory in the northwest of Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. The island has a surface area of 23 hectares and rises to 72 m (236 ft). It was known to the early 19th century sealers operating on Byers Peninsula.
Clark Nunatak is a rocky peak rising to 147 m at the southwest edge of the ice cap of Rotch Dome in western Livingston Island, South Shetland Islands, Antarctica near the south extremity of Urvich Wall. It surmounts Volturnus Lake on the south.
Varadero Point is a point projecting 620 m into Barclay Bay from Robbery Beaches on Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica and forming the west side of the entrance to Baba Tonka Cove. Dominated by Varadero Hill.
Villard Point is a point projecting 500 m into Barclay Bay from Robbery Beaches on Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica and forming the east side of the entrance to Baba Tonka Cove and the west side of the entrance to Kukuzel Cove.
Lair Point is a point projecting 570 m into Barclay Bay from Robbery Beaches on Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica and forming the east side of the entrance to Kukuzel Cove. Dominated by Lair Hill.
Vietor Rock is a rock linked by a spit to Nikopol Point on the south coast of Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica. The area was visited by early 19th century sealers operating on Byers Peninsula.
Richards Cove is the 450 m wide cove indenting for 550 m the north coast of Ray Promontory, Byers Peninsula, Livingston Island in the South Shetland Islands, Antarctica, entered east of Aglen Point and west of Voyteh Point. The area was visited by early 19th century sealers.
Toledo Island is the southern of two rocky islands in Smyadovo Cove on the west coast of Rugged Island in the South Shetland Islands. The feature is 320 m (1,050 ft) long in east–west direction and 110 m (360 ft) wide. It is separated from Rugged Island to the southeast and Prosechen Island to the north by 40 and 60 m wide passages respectively. The area was visited by early 19th century sealers.