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OSBM Bolt 
OSBM Bolt in rock.
Location
Grid reference: NC 6046 3626.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS1731.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Naver,
7.89km to the east.
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 6046 3626.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Rock outcrop.
Waypoint: OS1731.
Neighbouring Flush Brackets
| G2060 | Altnaharra 3.75km to the west. |
| G2061 | Ceann-na-coille 8.79km to the northeast. |
| G2062 | by Woody Knowe 13.66km 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.
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