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OSBM Bolt 
OSBM Bolt on culvert, concrete ledge, W side of road [3GL].
Location
Grid reference: SZ 6039 8942.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Culvert.
Waypoint: OS0085.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Fareham,
17.75km to the north.
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 Culvert, concrete ledge, W side of road.
Location
Grid reference: SZ 6039 8942.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
Structure: Culvert.
Waypoint: OS0085.
Neighbouring Flush Brackets
| G4451 | Rowborough Cottage 1.55km to the south. |
| G4430 | Little Westridge 1.56km to the north. |
| G4429 | Ryde, Oakfield Junior School 2.43km to the north. |
| G4452 | Yarbridge 3.08km to the south. |
| G4428 | Ryde, Queens Road 3.41km to the northwest. |
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 Culvert, concrete ledge, W side of road.
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