Includes any simple suction head used on a hose from a vacuum truck or a portable pump. To be considered in this category the skimming head must only be a suction device and not include any oil/water separation device such as a weir. Typical skimming heads are small and maneuverable, allowing their use in confined spaces such as among dock pilings. They can be operated from small boats, or dock side with vacuum trucks. Oil/water separators are recommended to deal with the large volumes of water that may be recovered along with the oil.