which were mounted in single-gun turrets at the corners of the superstructure. The turrets had an elevation range of from -5° to +15°. The guns could fire their shells at a rate of fire of four rounds per minute. They had a muzzle velocity of and a range of . Defense against torpedo boats was provided by six quick-firing (QF) 50-caliber Canon de Modèle 1891 guns, a dozen 40-caliber QF Modèle 1885 guns, and five 20-caliber QF revolving cannon, all in unprotected single mounts on the superstructure and in platforms on the military masts. The 65 mm guns had a rate of fire of eight rounds per minute and a range of while 47 mm guns could fire nine to fifteen rounds per minute to a range of . The five-barrel 37 mm revolving guns had a rate of fire of twenty to twenty-five rounds per minute and a range of . While conducting her sea trials in 1896, two of Charles Martels 65 mm and all of her 37 mm guns were replaced by four additional 47 mm guns. Her armament suite was rounded out by four torpedo tubes, two of which were submerged in the ship's hull, one on each broadside, with the other two on single rotating mounts abaft the forward 138 mm turrets; each mount could traverse an arc from 30° to 110° off the centerline. Charles Martel was initially equipped with Modèle 1892 torpedoes that had a warhead and a range of at a speed of . Armor Charles Martels armor weighed , 38.5% of the ship's displacement, and was constructed from a mix of nickel steel and compound armor plates that were manufactured by Schneider-Creusot. The waterline belt extended the full length of the ship and it had an average height of , although it reduced to aft. The belt had a maximum thickness of 450 mm amidships where it protected the ammunition magazines and propulsion machinery spaces and reduced to forward and aft. To save weight, the belt was tapered to a thickness at its bottom edge of amidships and at the ends of the ship. Above the belt was a thick strake of armor that created a highly-subdivided cofferdam to reduce the risk of flooding from battle damage. Coal storage bunkers were placed behind the upper side armor to increase its strength. The faces and sides of the main and intermediate turrets