title: Troughton Rocks
text: # Troughton Rocks
  
  Troughton Rocks (Bulgarian: скали Трутън, romanized: skali Troughton, IPA:) are the group of rocks off the northwest extremity of Snow Island in the South Shetland Islands, Antarctica lying in an aquatory of 27 ha that is 315 m long in east-west direction and 120 m wide. The vicinity was visited by early 19th century sealers.
  
  The feature is named after Edward Troughton (1753-1835), a British instrument maker who improved the theodolite design; in association with other names in the area deriving from the early development or use of geodetic instruments and methods.
  
  ## Location
  
  Troughton Rocks are centred at 62°44′42″S 61°33′23″W﻿ / ﻿62.74500°S 61.55639°W﻿ / -62.74500; -61.55639, which is 2.7 km west-northwest of Byewater Point. British mapping in 1968.
  
  