Metre–tonne–second system of units

The Metre–tonne–second system of units (MTS) is a coherent system of units for physical quantities that serves as an alternative to the more widely known SI (International System of Units). In the MTS system: - **Metre (m)** is the unit of length. - **Tonne (t)** is the unit of mass, with one tonne equal to 1,000 kilograms. - **Second (s)** is the unit of time.