Sail Rock is a rock lying 1 nautical mile (1.9 km; 1.2 mi) northwest of Shag Island and 7 nautical miles (13 km; 8.1 mi) north of Heard Island. This rock, though positioned several miles too far westward, appears to have been first shown on an 1860 sketch map compiled by Captain H.C. Chester, American sealer operating in the area during this period. It was more accurately charted and named on an 1874 chart by the Challenger expedition.
Map of Sail Rock
This article incorporates public domain material from the United States Geological Survey document "Sail Rock (Heard Island)" (content from the Geographic Names Information System).
References
Sail Rock (Heard Island) Wikipedia(Text) CC BY-SA