On 12 December 1959, the second attempt to launch a complete Titan (Missile C-2) took place at LC-16. One pad umbilical failed to detach at ignition, and an automatic shutoff signal terminated thrust before the missile could be released by the launcher mechanism. Ground crews quickly repaired the umbilical, and a second launch attempt was made two days later. However, the Titan exploded almost as soon as it was released by the launcher mechanism. The mishap was quickly traced to the Range Safety destruct charges on the first stage inadvertently going off. Martin technicians had moved the activator relay into a vibration-prone area during repair work on the missile, and testing confirmed that the shock from the pad hold-down bolts firing was enough to set off the relay. Because the RSO charges had spilled out the propellants and minimized mixing of them, the explosion was not as powerful as that of Titan B-5, and so damage to LC-16 was less extensive. The pad was repaired in only two months.