👉 A tachygraphically, also known as a tachographically or simply tachografically, is an instrument used for measuring and analyzing the speed of objects in motion. It consists of a series of bars that are connected to a meter or other device, which measures the distance between adjacent bars. This measurement allows for precise tracking and analysis of motion. In simple terms, when you hold your hand out with one finger held up high, and then slowly lower it down into your pocket