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OSBM Bolt 
OSBM Bolt in rock [3GL].
Location
Grid reference: NC 1410 0010.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1815.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ullapool,
5.17km to the southwest.
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ullapool to Ledmore levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: NC 1410 0010.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1815.
Neighbouring Flush Brackets
| 11770 | By Meall Mòr 224.72m to the north. |
| G1873 | River Kanaird Bridge 1.32km to the north. |
| 11925 | Glutton 1.71km to the southwest. |
| G1876 | Strathcanaird 2.17km to the northeast. |
| 11924 | Ardmair, Spindrift 3.80km to the southwest. |
Third Geodetic Levelling, Scotland (1956-68)
This bench mark was used during the Third geodetic levelling, Scotland. It was included on the Ullapool to Ledmore levelling line. The surveyor's description was OSBM Bolt in rock.
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