Arkansas-class monitor
The "Arkansas"-class monitors were the last class of four monitors ordered for the U.S. Navy (although the navies of Great Britain and Italy built and used monitors for shore bombardment during World War I and the former used them during World War II as well). Design. Single turreted monitors, these ships mounted the most modern heavy guns in the US Navy at the time they were built, /40 caliber guns. The "Arkansas"-class monitors did not see any combat during World War I and instead served as submarine tenders. Alexander C. Brown, writing in the "Society of Naval  Architects and Marine Engineers Historical Transactions" noted in a penetrating comment that: They had a displacement of , measured in overall length, with a beam of and a draft of . They were manned by a total crew of 13 officers and 209 men. "Arkansas" were powered by two vertical triple expansion engines driving two screw propellers with steam generated by four steam boilers. The engines in the "Arkansas" were designed to produce with a top speed of , however, on sea trials only had top speed over 12.5 knots, , the rest came in below. The "Arkansas" was designed to provide a range  of at . The ships were armed with a main battery of two 12-inch/40 caliber guns, either Mark 3 or Mark 4, in a Mark 4 turret. The secondary battery consisted of four /50 caliber Mark 7 guns along with three 6-pounder guns. The main belt armor was in the middle tapering to at the ends. The gun turrets were between , with barbettes. The "Arkansas" also had a deck. Bibliography. Books Online resources