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OSBM Bolt 
OSBM Bolt in rock.
Location
Grid reference: NC 5467 3101.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS1725.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Naver,
15.46km to the northeast.
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.
Location
Grid reference: NC 5467 3101.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS1725.
Neighbouring Flush Brackets
| G2060 | Altnaharra 5.02km to the northeast. |
| G2059 | Crask Inn 6.67km 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.
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