IMO Area to be Avoided (ATBA)
The IMO Area to be Avoided around Shetland is applicable to "all vessels over 5000 GT, carrying or capable of carrying oil or other liquid hazardous cargoes in bulk" calling at Sullom Voe or in transit around or near the coastline of Shetland.
Shetland Islands Council are conscious of the dangers to navigation around the Shetland coastline, due largely to offshore obstructions, strong tides, rapid weather changes and the presence of fishing vessels. Shetland Islands Council vigorously discourages navigation close to the Shetland coastline.
Mariners should observe the IMO scheme as detailed on the navigational charts of the Shetland area.