The Titans were fully configured for immediate launch in a matter of two minutes. The launch sequence included a number of test and initiation functions as well as a 20-second door opening sequence. The silo closure door weighed 780 tons and was locked down with hydraulically operated locks, and raised on hydraulic jacks. The hydraulics also operated the radial motors that pulled the door open with steel cables (four of them). Launch initiation was also accompanied with attenuation water which flowed 9000 gallons per minute for sound suppression and protection of the missile during the launch.