OSBM Bolt   

OSBM Bolt in rock.

Location
Grid reference: NC 5817 0091.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS2023.

Neighbouring Flush Brackets

G1851	Achinduich 983.26m to the south.
G1850	Lairg, Station 3.00km to the north.
G1920	Claonel 3.96km to the northwest.
G1921	Lairg, Bridge End House 5.09km to the north.
G1849	Lairg, Sutherland Arms Hotel 5.45km to the north.

The nearest fundamental bench mark is Lairg (1946), 6.44km to the north.

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