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OSBM Bolt 
OSBM Bolt.
Location
Grid reference: NC 6650 3847.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Unknown.
Waypoint: OS1736.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Loch Naver,
1.48km 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.
Location
Grid reference: NC 6650 3847.
Landranger 16: Lairg & Loch Shin, Loch Naver.
Structure: Unknown.
Waypoint: OS1736.
Neighbouring Flush Brackets
| G2061 | Ceann-na-coille 2.65km to the northeast. |
| G2062 | by Woody Knowe 8.23km to the northeast. |
| G2060 | Altnaharra 10.15km to the west. |
| G2063 | Rough Haugh 10.95km 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.
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