Autonomous lawn mower and a system for navigating thereof

An autonomous lawn mower () comprises a mower body () having at least one motor () arranged to drive a cutting blade () and to propel the mower body () on an operating surface via a wheel arrangement. The mower body () includes a navigation system () arranged to assist a controller () to control the operation of the mower body () within the predefined operating area (). The navigation system includes an odometry module (), a rotatable optical surveying module (), a sonic obstacle detection module (), a heat absorbing unit set on the outer surface of the mower body () for directing the heat generated within the mower body towards the atmosphere, and a detachable docking module () arranged to receive the mower body ().