[TeMPOraL]

The first rule of Subnautica: if in doubt, go deeper :).

But yeah, I remember there were a few moments I wasn't exactly sure what I'm supposed to be doing; fortunately, the world was interesting enough to explore that I ended up stumbling on "next steps" at random. Probably as intended - the game doesn't really force you into taking a specific path horizontally; the vertical axis provides a natural progression path. See also: the first paragraph :).

[MezzoDelCammin]

<mild storyline spoiler alert> except if You're in the void just outside the main continent </spoiler>

[TeMPOraL]

Oh right. "Warning. Entering ecological dead zone." Wait, what?!