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OSBM Bolt 
NEW OSBM BOLT LIVING ROCK 10.8M SE SIDE RD 17.7M SE C CUL (37.306m above Lerwick datum, 2nd order, new 1970).
Location
Grid reference: HU 3619 8481.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Landranger 3: Shetland, North Mainland.
Structure: Rock outcrop.
Waypoint: OS2616.
The nearest fundamental bench mark is Duncansby Head, 235.18km to the southwest.
Location
Grid reference: HU 3619 8481.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Landranger 3: Shetland, North Mainland.
Structure: Rock outcrop.
Waypoint: OS2616.
The nearest fundamental bench mark is Duncansby Head, 235.18km to the southwest.
If you have any corrections or additions to this record, please let us know.