the depth-charge throwers were removed in 1936 and more 200-kilogram depth charges were carried in their place. the navy reconsidered its anti-submarine warfare tactics after the war began in september and intended to reinstate the depth-charge throwers, although these were an older model than the one previously installed; "cassard" received hers in may 1940 at toulon. her depth charge stowage now consisted of 24 heavy depth charges and 16 of the 100-kilogram ones. at the same time, a pair of browning 13.2-millimeter aa machine guns were installed on the quarterdeck. during the ship's late-1941 anti-aircraft refit, the mainmast was replaced by a platform for a single 37-millimeter twin-gun mount and two of her single 37-millimeter mounts were transferred to the platform while the other two single mounts were removed. the hotchkiss machine guns were moved to new platforms between the funnels and the brownings were positioned in front of the bridge. "cassard" received a british alpha 128 asdic system in december 1941 that had been taken from another ship.