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OSBM Bolt 
NEW OSBM BOLT LIVING ROCK 7.5M N BANK STR 22.4M NW C BR (3.878m above Lerwick datum, 2nd order, new 1979).
Location
Grid reference: HU 4502 8791.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Structure: Rock outcrop.
Waypoint: OS2615.
The nearest fundamental bench mark is Duncansby Head, 241.80km to the southwest.
Location
Grid reference: HU 4502 8791.
Landranger 1: Shetland, Yell, Unst & Fetlar.
Landranger 2: Shetland, Sullom Voe & Whalsay.
Structure: Rock outcrop.
Waypoint: OS2615.
The nearest fundamental bench mark is Duncansby Head, 241.80km to the southwest.
If you have any corrections or additions to this record, please let us know.