Understanding Scan Every Useful Fragment
Blueprint progression is driven by scanning appropriate technology pieces.
This is an original reference for the first Subnautica. Your current depth rating, oxygen, available tools and navigation route determine when an objective is practical. Follow actual in-game PDA and Fabricator information for any values that vary by version.
How to use this information
Scan wreck edges, vehicle fragments and abandoned habitat modules as you go.
What to avoid
Carrying fragments in inventory will not replace the Scanner.