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OSBM Bolt 
OSBM Bolt on concrete slab at sea wall.
Location
Grid reference: SZ 5012 9561.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Other.
Waypoint: OS0084.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Calbourne,
11.79km to the southwest.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Gurnard (IOW) to Freshwater (IOW) levelling line. The surveyor's description was OSBM Bolt on concrete slab at sea wall.
Location
Grid reference: SZ 5012 9561.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Other.
Waypoint: OS0084.
Neighbouring Flush Brackets
| G4422 | Cowes 814.92m to the west. |
| G4423 | East Cowes 872.35m to the southeast. |
| G4424 | Whippingham 2.00km to the southeast. |
| G4421 | Gurnard 2.14km to the west. |
| G4022 | Avenue Cottage 3.09km to the west. |
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Gurnard (IOW) to Freshwater (IOW) levelling line. The surveyor's description was OSBM Bolt on concrete slab at sea wall.
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