<P> It is a general purpose unit capable of carrying and pumping water, carrying rescue and cutting equipment to deal with road traffic accidents and other rescue operations, a large ladder (for example 13.5 m) and several smaller ladders and roof ladders . </P> <P> The appliance also carries breathing apparatus, lighting, tools, trauma care packs, water rescue gear, lines (ropes), hoses, and possibly chemical protection suits and foam . The vehicle will be crewed by four to six firefighters . </P> <P> A Water Ladder or Water Tender is very similar to the aforementioned appliance, however with less emphasis on rescue gear and will usually carry a smaller ladder (for example 9m or 10.5 m). </P> <P> It is normally mobilised to augment and support the initial appliance or to respond to secondary, less urgent incidents . It is crewed by four to six firefighters . </P>

Where does the water come from in a fire engine