The addition of director control facilitated a full, practicable fire control system for First World War ships, and most RN capital ships were so fitted by mid 1916. The director was high up over the ship where operators had a superior view over any gunlayer in the turrets. It was also able to co-ordinate the fire of the turrets so that their combined fire worked together. This improved aiming and larger optical rangefinders improved the estimate of the enemy's position at the time of firing. But with the longer practical ranges came the increased time of flight. The Fire Control System now had to account for more variations and more complicated corrections than was originally planned. The Dreyer Table had some mechanical flaws, particularly when additional loads were introduced in the form of unauthorised accoutrements concocted by individual gunnery personnel, but on the whole performed in a satisfactory manner. The system was eventually replaced by the improved "Admiralty Fire Control Table" for ships built after 1927, although Dreyer Tables went to war a second time in World War II, notably in Britain's unmodernised battleships and battlecruisers.