A monitor is a type of small warship that is neither fast nor strongly armored but carries disproportionately large guns. Monitors were used by some navies from the 1860s, during the First World War a
USS Monitor, the first monitor (1861)
HMS Marshal Ney used a surplus 15-inch gun battleship turret.
Officers of a Union monitor, probably USS Sangamon, photographed during the American Civil War
Huáscar anchored in the harbour at Talcahuano
The casemate ironclad was a type of iron or iron-armored gunboat briefly used in the American Civil War by both the Confederate States Navy and the Union Navy. Unlike a monitor-type ironclad which car
Monitor (warship)
…a Union monitor, probably USS Sangamon, photographed during the American Civil War Nineteenth century U.S. Navy monitors forcing the surrender of the casemate ironclad CSS Tennessee during the Battle of Mobile Bay American Civil War In Latin, a monitor is someone who admonishes: that is, reminds others of their…
CSS Palmetto State, the archetypal casemate ironclad. Note the sloped deck and the low waterline.
Detail of the remains of USS Cairo as a museum ship today. The sloped casemate deck is clearly visible.
Casemate Ironclad USS Cairo in a contemporary photograph.