Beacon

Customizable Compass marker to assist with navigation.
Overview
The 
Beacons are functionally similar to other handheld or placeable lights in that they exist to provide visibility and orientation, but their beam is directed straight ahead instead of illuminating only the area around them. This makes them especially useful for pointing toward a base, a point of interest, or a route through an area that is difficult to navigate.
Because the 
Historically, related beacon-like or signal-style items in Astroneer have been tied to exploration and recovery content. The game’s early development also included a number of historical probe-related objects, showing that marked points of interest have long been part of its exploration theme.
Official description
Customizable Compass marker to assist with navigation.