The sawblades will travel until the fire button is released, effectively giving them unlimited range. They will slowly home on the enemy when they stop.
The FRIED aka Fiery Ring of Inevitable, Eternal Destruction is a ring of superheated plasma that expands from the Marauder and F.R.I.E.S. anything in its path.
Overall, the Ur-Quan Kohr-Ah Marauder is one of the most powerful ships in the Quadrant.