- fly approx. at 100m Altitude
- point nose down with the Composition Scanner reticle active (it'll flash up as soon as it detects anything)
- use Thrusters to move Ship forward and visually assess the Surface while roughly maintaining Altitude
- do not exceed 150-200m, as that quickly approaches the upper limit where those are still rendered
- don't be too fast, the pop-in of new tiles containing all the Details can take a little while to render, so 50-100m/sec absolute tops should be plenty
- you can use Night Vision as a helper as well... Every Detail on the Surface will be clear green while Bacteria patches typically aren't. You'll be looking for those patches that aren't glowing green.
- flat and smooth Terrain is where you'll find them the most (Terrain to smooth that you could race an SRV over without any issues); Bacteria is basically the opposite of i.e. Fungoid or Concha, for which you'd need to check out rocky and steeper Terrain
Most Bacteria Patches on the Ground are simple and circular (small), some larger ones look a bit like a "cat's paw" on the ground.
Once the 1st one is found and the visual footprint vs. the ground is known, Altitude can be increased upto ~150m if required. Normally that's not required, as the next batch of Bacteria should be found quite easily.
Example Images can be found here :
https://forums.frontier.co.uk/threads/finding-bio-signals.576565/#post-9190847
New Images :
View attachment 236435
(43km Altitude : seeking out the clear, smooth areas)
View attachment 236436
(3.7km Altitude)
View attachment 236437
(found some patches of Bacteria shortly thereafter)
View attachment 236438
(a large Patch, good contrast against the Terrain - which isn't always the case)