Trident II (D-5) missile production began in December 1987. The Navy deployed its first operational D-5 sea launched ballistic missile on March 23, 1990. The program has had six production buys through 1992 procuring 298 missiles. The Navy is negotiating with the prime contractor for the FY 1993 production contract with an anticipated contract award date of October 1, 1992. The audit objective was to determine if the Navy Strategic Systems Program Office used the most efficient method for buying the D-5 missile.