MAT

The MAT (Material Analysis Transmitter) is a module used to advance missions in order to get the Hoverboard and the VTOL.

Source
MATs are only found on Desolo and Vesania. They show up as blue circle with a pointed bottom on the Compass as soon as the corresponding Vehicle Data Recorder is destroyed using.

Uses
After locating the MAT, certain resources will need to be provided in order to advance the corresponding missions. After completing all tasks, the MAT will explode and the player will be given a Hoverboard or a VTOL (depending on the planet) and the corresponding Schematic will be unlocked.