I think that eridian scientists would really enjoy testing Grace's ability to see. I feel like echolocation is Comprehensive but Limited in range. Like, sure, through doors and walls but only up to uhhh maybe 50m? (i dont know how to guess scale in space scenes. 100m?)
In the book somewhere in the tunnel scenes (so I hear) rocky freaks out that grace returns later than he agreed because he slept in. That implies that rocky couldn't hear the ship from his part of the tunnel.
Compared with humans that can see for MILES unless something gets in the way.
They're absolutely chucking lampposts in all kinds of weird places to see if Grace can see them from the edge of his biodome at night.
Grace: "Oh yeah, I can see Adrian at lamp 58"
Scientist: "this is bullshit"





















