Edited sentence: A hand traverse was usually needed by the Panther gunner to fine tune the aim.After November 1943, with the maximum engine speed governed down to 2500 rpm, turret traverse decreased to a maximum of 360 degrees in 18 seconds.By comparison, the M4 Sherman turret traversed at up to 360 degrees in 15 seconds independant of engine speed, which gave it an advantage in close-quarters combat.The intitial Ausf D models had a hydraulic motor that could traverse the turret at a maximum rate of 360 degrees in 60 seconds independant of engine speed.This complicated arrangement of the turret traverse mechanism was a weakness as traversing the Panther's turret rapidly onto a target required close coordination between the gunner and driver (to rev up the engine to maximum speed).This slow traverse speed was improved in the Ausf A model with a hydraulic traverse that was dependent on the engine speed, with a maximum rate of 360 degrees in 15 seconds if the engine was running at 3000 rpm