The standard fire engine is an apparatus designed primarily for firefighting operations. The primary purpose of the engine is transporting firefighters to the scene, providing a limited supply of water with which to fight the fire, and carrying tools, equipment, and hoses needed by the firefighters. The tools carried on the fire engine will vary greatly based on many factors including the size of the department and what sort of terrain the department must handle. For example, departments located near large bodies of water or rivers are likely to have some sort of water rescue equipment. Standard tools found on nearly all fire engines include ladders, hydraulic rescue tools (often referred to as the jaws of life), floodlights, fire hose, fire extinguishers, self-contained breathing apparatus, and thermal imaging cameras.