OSBM Bolt   

OSBM Bolt in rock.

Location
Grid reference: NC 5717 0920.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS1708.

Neighbouring Flush Brackets

S7768	Colaboll ? 1.76km to the northwest.
G1849	Lairg, Sutherland Arms Hotel 3.05km to the south.
G1921	Lairg, Bridge End House 3.31km to the south.
G1920	Claonel 4.66km to the south.
G1850	Lairg, Station 5.40km to the south.

The nearest fundamental bench mark is Lairg (1950), 1.56km to the south.

Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Lairg to Loch Naver levelling line. The surveyor's description was OSBM Bolt in rock.