Southampton (O.S.O.) Fundamental Bench Mark   

Location
Grid reference: SU 4207 1280.
Landranger 196: The Solent & The Isle of Wight, Southampton & Portsmouth.
GPS network passive station: H1SU4212.
Waypoint: FM0541.

Neighbouring Flush Brackets

1	Southampton, Ordnance Survey Office 60.83m to the north.
926	OS exhibition bracket 60.83m to the north.
1000	OS exhibition bracket 60.83m to the north.
2787	Southampton, The Avenue 1.06km to the north.
2940	Southampton, Strand 1.21km to the south.

The nearest fundamental bench mark is Maybush, 4.01km to the northwest.

Second Geodetic Levelling, England & Wales (1912-21)
This fundamental bench mark was used during the Second geodetic levelling, England & Wales, and was levelled with a height of 74.3510 feet [22.6622 metres] above mean sea level (Newlyn datum). It was included on the Fareham to Southampton, Southampton to Tide Gauge, Empress Dock, Southampton, Southampton to Tide Gauge, Town Quay, Southampton, Southampton to Wimborne and Southampton to Winchester levelling lines.

Third Geodetic Levelling, England & Wales (1950-68)
This fundamental bench mark was used during the Third geodetic levelling, England & Wales, and was levelled with a height of 74.3510 feet [22.6622 metres] above mean sea level (Newlyn datum). It was included on the Fareham to Southampton, Maybush Circuit and Southampton to Wimborne levelling lines.

Logged Visits
Logged on 9th August 2006 by RodS. Grid reference: SU 42088 12831. Condition: Good.
Classic 2GL FBM pillar now within paved enclosure. Manhole cover adjacent covers buried chamber. Outside former OS offices (now courts).

Logged on 10th August 2003 by Janner. Condition: Good.
On the pavement, at the entrance to the new Law Courts, alongside the old Ordnance Survey HQ