Groma Rock

Groma Rock is the 45 m long in south-north direction and 30 m wide rock off the northwest extremity of Low Island in the South Shetland Islands. Its surface area is 0.1 ha.
The feature is named after the ancient Roman surveying instrument groma, and in association with other names in the area deriving from the early development or use of geodetic instruments and methods.

Location

Groma Rock lies in Osmar Strait at, which is 370 m north-northwest of Dioptra Island and 1.75 km north-northeast of Cape Wallace. British mapping in 2009.

Maps

South Shetland Islands: Smith and Low Islands. Scale 1:150000 topographic map No. 13677. British Antarctic Survey, 2009
Scale 1:250000 topographic map of Antarctica. Scientific Committee on Antarctic Research. Since 1993, regularly upgraded and updated