Rules Reference:
GUIDES
Each ship’s base has two pairs of movement guides, one pair on the front and one pair on the back. These guides are ignored for all purposes except executing maneuvers and overlapping obstacles and other ships. In those cases, the guides count as part of the base.
FAQ:
Q: Are the movement guides on bomb tokens considered when measuring range or when a ship overlaps them?
A: Yes
So they are used for measuring range or not???