A weir skimmer is used to remove oil from the water.
A weir skimmer has three connected floats supporting a central shallow dish.
The top of the dish sits 10mm - 20mm below the surface of the water. Upon
starting the skimmer the water in the dish is sucked away by a pump. As the dish
empties the surface oil and some water, if the oil is not thicker than 10mm -
20mm, falls into the dish and is pumped to shore.