sentences:  They followed the standard British practice of the time of mounting the main battery in two twin turrets, one forward and one aft.The Royal Navy believed that the 10-inch guns were too light to be effective against modern battleships; they could penetrate the armour of the latest German and Russian battleships, but not that of the better-armoured French battleships.The guns had minor differences in construction, but they both fired projectiles at a muzzle velocity of ; this provided a maximum range of at the gun's maximum elevation of 13.5°.