When there are light oil spills (e.g. engine oil), the robot can be equipped with an absorbent sheet for oil on top of the net frame. This configuration allows to collect both floating macro-waste and oil (or pollen) iridescence. Due to its water-repellent characteristics, the sheet positioned at the top of the net remains on the surface of the water. It absorbs oil sprays (and / or is impregnated with pollen) and collects macro-waste in the net. The sheet can be replaced independently of the net and can be thrown into the oil and hydrocarbon containers to follow the proper treatment path. When soiled, absorbent sheets are subject to the regulations in force locally and must be treated appropriately according to the waste generated by their use: collection and incineration by specialized companies