Her rudder and anchor chains were installed, and her double bottom was sealed. At this time, the ship's armament was mostly incomplete; the forward main battery turret had its guns and armor plate installed, but it lacked necessary shell handling equipment and fire control systems. The superfiring turret was without its guns or armor and none of the secondary turrets had been installed. During the rush to prepare the ship to depart, a pair of twin-mount Mle 1930 anti-aircraft guns, taken from the net layer , was installed on 18 June in place of the 100 mm guns, construction of which had been delayed, but they had no ammunition or directors at the time. Three of the 37 mm guns and six of the 13.2 mm mounts were installed, and these were the only usable weapons aboard the ship at the time of her departure, albeit only under local control as their director systems were also still incomplete. While work was still being completed, the ship's commander, Capitaine de vaisseau (CV—Ship-of-the-line captain) Pierre-Jean Ronarc'h received orders on 11 June to depart for Casablanca in French Morocco as soon as was practical. He estimated that 19 June would be the best opportunity based on the tides, and early that morning Jean Bart was towed out of the fitting-out dock by three tugboats at 03:30 and into a channel that had been quickly but not sufficiently dredged to allow her escape. The ship accidentally grounded in the darkness, bending one of her screw blades, but the tugs pulled her free and at 04:45, the crew got Jean Barts engines started. Shortly thereafter, three German Heinkel 111 bombers arrived at a height of to attack the ship. One of the aircraft scored a hit with a bomb that struck between the main battery turrets but did insignificant damage. Jean Bart increased speed to and at 06:30, rendezvoused with the destroyers and , which were to escort her to Casablanca. The British destroyer and two tugs met the ship at sea, offering to tow Jean Bart to Britain, but Ronarc'h declined the offer. Jean Bart took on fuel oil at sea from a pair of tankers and at 18:00, she left the area with the two destroyers. While cruising off Lorient the next day, the destroyer relieved Le Hardi and the three ships continued on at a speed of . They arrived in Casablanca