Galactic Patrol by E.E. Smith

Kimball Kinnison sat at his controls, smoking a rare, festive cigarette and smiling, at peace with the entire universe. For this new picture was in every element a different one from the old. Instead of being in a pitifully weak and defenseless lifeboat, skulking and hiding, he was in one of the most powerful battleships afloat, driving boldly at full blast almost directly toward home. Instead of only two, the patrolmen were now three in number, and LaVerne Thorndyke, master technician, was a telling addition to their force. Also, they had under them almost a normal crew of alert and highly trained Velantians.

Best of all, the enemy, instead of being a close-knit group, keeping Helmuth informed moment by moment of the situation and instantly responsive to his orders, were now entirely out of communication with each other and with their headquarters, groping helplessly. Literally, as well as figuratively, the pirates were in the dark -- the absolute blackness of interstellar space. Then Thorndyke entered the room, frowning slightly.