They were fitted with the simpler Mle 1919 type aviso mechanical computer; only Léopard and Lynx had the Mle 1923B computer upon completion. The earlier ships had their Mle 1919 computers replaced by the later computer beginning in 1927. Development of the director was abandoned and the ships were fitted with a Mle B.1926 coincidence rangefinder that fed data to the computers. This was replaced by a stereoscopic rangefinder in 1931 and by a PC.1936 model from 1937. The anti-aircraft armament of the Chacal class consisted of two 50-caliber Canon de 75 mm modèle 1924 guns in single mounts positioned amidships. The mounts could elevate to +90° and depress to -10° and the guns could be loaded at any angle up to +75°. Their shells were fired at a muzzle velocity of . The guns had a range of and a ceiling of about . They had a theoretical rate of fire of 15 rounds per minute, but only about half that in service. The ships carried 150 rounds, plus 60 star shells, for each gun, of which 30 rounds could be stowed in ready-use lockers. In 1932, the navy decided that the ships were too top-heavy to accept a director for the guns so they were to be replaced by four twin mounts for Hotchkiss anti-aircraft machineguns. These were installed in 1933–34, together with a dedicated OPL J.1930 stereoscopic rangefinder. The substitution saved about of weight, although the machineguns proved to have limited utility in combat. Combat operations in 1939 had shown the French that their anti-aircraft defenses were inadequate and they planned to augment them beginning in 1940 by replacing the mainmast with a platform for a twin-gun mount for the light AA gun. This was only installed aboard Panthère before the armistice with Germany and it was removed shortly afterwards. The Chacal-class ships carried two above-water triple sets of torpedo tubes. Their Mle 1919D torpedoes had a , picric-acid warhead and could be set for a speed of 35 knots with a range of or for . A pair of depth charge chutes were built into their stern; these housed a total of twenty Guiraud Mle 1922 depth charges. They were also fitted with four depth-charge throwers abreast the fore funnel for which they carried a dozen Guiraud Mle 1922 depth charges. The four depth charge throwers were removed in 1932 as they were badly positioned and