Engineering drawing as a visual channel in communication medium

Engineering Graphics is an important technical basic course known as the language of engineering and technology (design language) 'in two dialects': the First-angle orthogonal projection (earlier referred to as method E) and the Third-angle orthogonal projection (earlier referred to as method A). This course for engineering students is essential for introducing engineering to their further studies and it involves several disciplines (e.g. Machine Design, Engineering Measurements, Mechanical Engineering Projects). Engineering Graphics serves to create a graphic model (engineering drawing) according to which machine parts can be manufactured and machines and buildings can be assembled. Graphic models can also be considered in the aspect of semiotic principles. The tools of expression of Engineering Graphics are graphic representation, figure (image) and drawing specification, which are perceived by the visual and auditory organs (in the case of verbal contact between the writer of a drawing and the reader of a drawing, i. e. oral form), and represent the means of communication for engineering practice. The requisite elements for communication are: sender (writer of a drawing), receiver (reader of a drawing), channel, medium and at least a partially overlapping sign repertoire of sender and receiver. In order for overlapping to be complete and unambiguous, the Engineering Graphics course begins with learning the design language which is based on graphic conventions.