Roberts-class monitor
The "Roberts" class of monitors of the Royal Navy consisted of two heavily gunned vessels built during the Second World War. They were the "Roberts", completed in 1941, and "Abercrombie", completed in 1943. Features of the class, apart from two 15-inch guns in a twin mounting (taken from two First World War era "Marshal Ney" class monitors), were shallow draught for operating inshore, broad beam to give stability (and also resistance to torpedoes and mines) and a high observation platform to observe fall of shot.