'''Agamenticus'''—a twin-screw, double-turreted [[ironclad]] monitor—was laid down sometime in 1862 at the Portsmouth (N.H.) Navy Yard and launched on 19 March 1863. Since operational experience with the monitors during the [[Civil War]] had shown the necessity for better ship-control and navigational facilities, Agamenticus underwent alterations in the first few months of 1864, notably the addition of a "[[hurricane deck]]" that extended between the two turrets and over the machinery spaces amidships. | '''Agamenticus'''—a twin-screw, double-turreted [[ironclad]] monitor—was laid down sometime in 1862 at the Portsmouth (N.H.) Navy Yard and launched on 19 March 1863. Since operational experience with the monitors during the [[Civil War]] had shown the necessity for better ship-control and navigational facilities, Agamenticus underwent alterations in the first few months of 1864, notably the addition of a "[[hurricane deck]]" that extended between the two turrets and over the machinery spaces amidships. |