Mainsail Rock

Mainsail Rock

Mainsail Rock (60°37′S 46°3′W / 60.617°S 46.05°W / -60.617; -46.05) is a rock lying 0.6 nautical miles (1.1 km) southwest of Spine Island in Sandefjord Bay, South Orkney Islands. It is the largest and easternmost of a chain of three rocks trending in a NW-SE direction off the southeast side of Monroe Island. The rock was named by DI personnel following their survey in 1933.

 This article incorporates public domain material from the United States Geological Survey document "Mainsail Rock" (content from the Geographic Names Information System).