 The main guns of the Admiral @-@ class ships were controlled from either of the two fire @-@ control directors . The primary director was mounted above the conning tower in an armoured hood and the other was in the fore @-@ top on the foremast . ' B ' turret could also control all the main gun turrets while ' X ' turret could control the rear guns . Data from a 30 @-@ foot ( 9 @.@ 1 m ) rangefinder in the armoured hood were input into a Mk V Dreyer Fire Control Table located in the Transmitting Station ( TS ) on the platform deck where they were converted into range and deflection data for use by the guns . The target 's data were also graphically recorded on a plotting table to assist the gunnery officer in predicting the movement of the target . The fore @-@ top was equipped with a 15 @-@ foot ( 4 @.@ 6 m ) rangefinder . Each turret was provided with a thirty @-@ foot rangefinder in an armoured housing on the turret roof and a Dumaresq analogue computer for local fire @-@ control . 
