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 properly and showed no significant discrepancies. (IO Exhibit 147).

(2) (U) The AEGIS combat system was working exceptionally well on 3 July. No anomalies were noted in data analysis or from operator statements. (Enclosure 15).

(3) (U) Semi-annual check for the OE120 IFF Phased Array Antenna was last completed in February 1988 with its next scheduled check to be completed on 12 July 1988. (IO Exhibit 145,  p.350).

(4) (U) Upon the completion of the OE120 July Semi-Annual PMS check of the OE120 IFF antenna, the following discrepancies were noted: Phase Shifter #13 had no power out; #12 was 1.0 db below PMS Spec; one Phase Shifter was within spec. The OE 120 has a total of 16 phase shifters ( p. 350).

(5) (U) The C&D IFF data indicates Phase Shifter degradation was not significant but could open the possibly of sporadic detections in side lobe beams. ( p. 359).

(6) (U) The CASREP summary for USS VINCENNES shows no significant degradations of AEGIS Combat System as of the 8 o’clock reports for 2 July 1988, with the exception of CIWS (close in weapons system) Mount 22. (IO Exhibit 139). The data from NWSC Dahlgren substantiates the excellent performance of the system. (IO Exhibit 91; enclosure 15).

(7) (U) The SPY-1A signal processor alignment was completed during the last week of April 1988 and the first week of May 1988. Operational Performance Tests (OPTS) were run weekly with no significant degradation. The system had been operational almost non-stop since arrival in Gulf. Its performance was exceptional. (IO Exhibit 147, 148, 142, 153).

(8) (U) One of the consoles in CIC (AIC) was down. ( p. 707).

(9) (U) At the time of the incident, Mount 22 (CIWS) was down and Mount 21 was in "AAW AUTO" mode with "hold fire" on. (IO Exhibit 91).

d. Communications

(1) (U) On 3 July 1988, the following nets were being recorded on the ship’s 19 channel tape recorder — RD 390: Fleet Tactical Net; Deconfliction Net; ASUW C and R; SAG Common; MEF Execution;  International Air Distress (IAD); AAW C and R (DSA); IO Fleet SEVOCOM; ASUW C and R (HF); AIC #1 and 2; EW C and R;