range from a standard fire engine, with a larger-than-usual capacity (usually called a tanker), to a water tender equipped with specialty equipment such as fixed monitors and long-throw foam nozzles (usually called a Bulk Water Carrier). Several areas also own converted semi-trailer fuel tankers, capable of holding many thousands of litres of petrol, foam or other retardant. These are most often used in severe HazMat situations, such as oil refinery fires or fuel tanker accidents, where a large and continuous volume of water is needed. Gallery of water tenders See also Fire command vehicle Rescue vehicle Firefighting apparatus Fireboat Portable water tank References Fire service vehicles