System Reference Document

COMBAT MOVEMENT 

The standard Move Action is to, um... move... your Speed in yards. You could use miniatures and a battle mat (with a scale of one yard per hex/square) to keep track of character movement and position, but this isn't necessary by any means. 

Position does matter, though, even if you choose to track it abstractly. One important aspect of combat movement is that characters must be adjacent (defined as within three feet of each other) to engage in melee combat. Another is that different ranged weapons have different effective ranges, also measured in yards. 

Characters with the Blitzkrieg Technique can use a Full Turn Action to move twice their Speed in yards, useful for making a quick getaway. 

Besides moving, there are numerous other actions that count as Move Actions. Generally speaking, these actions are more involved than Free Actions, but not as time-consuming as Attack Actions.