6338(T)/16 SCOTLAND  East Coast  Cromarty Firth  Buoy.
Source: Cromarty Firth Port Authority Notice 20/16

An unlit yellow buoy has been temporarily established in position 5741'.41N., 406'.05W.

The buoy marks the east end section of a mobile oil rig chain lying on the seabed between Nigg Sands West and
Nigg Sands East light-buoys.

Mariners are advised to maintain a safe distance and to consult the Harbour Master for the latest information.