A bottle-shaped tank with a buoyancy collar fitted around the neck. The lower part of the buoy provides a free-flooding space for the storage of oil to be discharged from a floating production unit.
“1 milion barrel capacity (approximately 140,000tonnes) storage buoy has a diameter of 60m and a depth of 96m. The buoy is able to operate in water depths of up to 2000m and in wind speeds of 41 knots.”