If noone moves, the Knights already have a clear view of everyone (if all the knights are good).
The Knights can see one space away (does this mean 360 degrees?), and any space where they can move.
Each Knight can see their adjacent Rook, Bishop, the three pawns in front of him, and the pawn in front of the Queen/King (depending on which side the knight is on).
Essentially, if noone moves the Knights can scan everyone.