Navigation, especially when dark, has always been one of the more challenging apsects of Subnautica. I found the holographic topographic maps, both on the Seaglide and Scanner Room in OG Subnautica, super helpful. It was an imperfect tool, but it’s limitations helped keep it grounded and from being OP.
I’d love to see a version of that in Subnautica 2. Either as part of an existing tool (like the hand scanner or Wavemaker), as part of the Scanner Station, OR as a standalone deployable. I like the idea of it being deployable equipment like a beacon or portable locker. It could sonar ping manually or at a fixed interval and generate a holographic topo map of the area in a radius around the device.

This I would absolutely love