Might be a bit simple but not the “North Star” (Polaris)? Navigation could work via analysis of stars positions relative to eachother/positions of constellations relative to the ship. You could justify it in-universe as being a nod to how early mariners used these same stars to navigate Earth’s oceans.

There’s coffee in that light beam!

Looks like you saw right through the marketing. Seems like that product failed to materialize. It fairs to reason those claims were intangible.