sentences:  She was refitted four times during this period to add more gunnery equipment and to rectify some of her defects.These included reinforcement of her superstructure where it had been damaged by the muzzle blast from her 138 mm guns and replacement of her corroded aluminum ladders and booms with steel ones.A high-angle fire-control director for her 75 mm guns was added, two of her 75 mm gun were converted to powered, remotely controlled mounts, gun shields were added to the 75 mm guns to protect their crews from blast and facilities for another 40 men was installed on her mine deck.