Star Wars: A Flicker of Hope
You can make a strafing attack without a Vehicle.
Prerequisite: Base attack bonus +1
Benefit: When you make an autofire attack, instead of attacking a 2-square-by-2-square area, you may attack a line 1 square wide and 4 squares long.
Special: If you are using a jet pack, you can use the strafe feat to make an autofire attack against all squares you fly over.
Source: The Force Unleashed Campaign Guide, p. 35.