In cooperation with Allied forces attacking on the coast of Belgium, the monitors were used on a protracted shore bombardment. In the night of 27/28 September, the seven monitors available to the Patrol bombarded targets near Ostend and Zeebruge, using their sub-calibre (smaller) guns, to trick the Germans into thinking that a night landing by Allied forces might be made there (following the earlier Ostend and Zeebrugge Raids in April).