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OSBM Bolt 
OSBM Bolt in rock [3GL]; OSBM BOLT ROCK 4.2M W RD 19.2M NE C STR.
Location
Grid reference: NC 2480 1999.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1834.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Ledmore,
6.53km 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 Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt in rock.
Location
Grid reference: NC 2480 1999.
Landranger 15: Loch Assynt, Lochinver & Kylesku.
Structure: Rock outcrop.
Waypoint: OS1834.
Neighbouring Flush Brackets
| G1809 | Inchnadamph Hotel 1.68km to the north. |
| G1881 | Ledmore 7.85km to the south. |
| G1880 | Elphin School 8.58km to the south. |
| G4385 | Altnacealgach Hotel 9.34km to the south. |
| G1882 | Altnacealgach Hotel 9.35km 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 Ledmore to Laxford Bridge levelling line. The surveyor's description was OSBM Bolt in rock.
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