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OSBM Bolt: River Thames Transfer Bolt B 
Transfer Bolt B on sea wall, S side of River Thames.
Location
Grid reference: TQ 6499 7444.
Landranger 177: East London, Billericay & Gravesend.
Structure: Other.
Waypoint: OS0110.
Neighbouring Flush Brackets
The nearest fundamental bench mark is Snodland,
12.16km to the south.
Third Geodetic Levelling, England & Wales (1950-68)
This bench mark was used during the Third geodetic levelling, England & Wales. It was included on the Hatfield Peverel to Snodland levelling line. The surveyor's description was Transfer Bolt B on sea wall, S side of River Thames.
Location
Grid reference: TQ 6499 7444.
Landranger 177: East London, Billericay & Gravesend.
Structure: Other.
Waypoint: OS0110.
Neighbouring Flush Brackets
| S0654 | Gravesend, Methodist Church 340.15m to the south. |
| S0882 | Tilbury, Worlds End PH, Tide Gauge Aux 2 844.04m to the north. |
| S0881 | Tilbury Laundry 1.26km to the northwest. |
| S0653 | Northfleet, St. Mark's Church 1.39km to the west. |
| G5140 | Tilbury, Dock Road 1.72km 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 Hatfield Peverel to Snodland levelling line. The surveyor's description was Transfer Bolt B on sea wall, S side of River Thames.
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