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OSBM Bolt 
NEW OSBM BOLT N ABUT BR E SIDE RD 7.7M S N END BR (22.595m above Lerwick datum, 2nd order, new 1979).
Location
Grid reference: HU 3381 8091.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Landranger 3: Shetland, North Mainland.
Structure: Bridge.
Waypoint: OS2619.
The nearest fundamental bench mark is Duncansby Head, 230.64km to the southwest.
Location
Grid reference: HU 3381 8091.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Landranger 3: Shetland, North Mainland.
Structure: Bridge.
Waypoint: OS2619.
The nearest fundamental bench mark is Duncansby Head, 230.64km to the southwest.
If you have any corrections or additions to this record, please let us know.