Quote Originally Posted by factotum View Post
I just got into the habit of having the materials to build a scanner room base--from memory, that's a multipurpose room, a single passage, the scanner room, a hatch, and a bioreactor for power. All that fits easily into the storage of a Seamoth and you can quickly build it and see what's available in the local area, killing some fish for power if necessary. The annoying bit is getting all the blueprints required for that together, although I think the scanner room you find naturally if you're following the main story--bioreactor is more of a problem.
I think the passage is built into the scanner room/multipurpose room, because I seem to recall running into that when I built one of my deeper bases.

I also usually go with the thermal reactor, but the Magnetite is irritatingly sparse.