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Director, Operational Test & Evaluation
FY97 Annual Report

FY97 Annual Report


Navy ACAT II Program
608 systems
Total program cost (TY$) $2,677.6M
Average unit cost (TY$) $3.8M
Full-rate production FY90
(Block I)

Prime Contractor
Hughes Missile Systems Co.
Tucson, AZ


PHALANX Block I CIWS is a radar-controlled, high rate-of-fire Gatling gun, used on surface ships to provide terminal defense against airborne threats and anti-ship cruise missiles in particular. Search and track radars share a common transmitter and their separate antennas are protected from weather effects by a radome, shown in the photograph. In operation, CIWS tracks an approaching target, as well as the outgoing projectiles, and adjusts gun pointing to bring the projectile stream in line with the target. The CIWS Block IA upgrade introduces a high order language computer (HOLC) and an end-to-end test capability. It further introduces adaptive filtering software, written in ADA, as well as a basic interface to accommodate integration with the Ship Self Defense System (SSDS).

PHALANX Block I CIWS contributes to the JV 2010 operational concept of full dimensional protection in that it enhances ship self protection against certain anti-ship cruise missiles that have "leaked" past outer air defenses. Given that some of the ships using CIWS are also platforms from which strike operations are executed and others are logistics support ships, RAM indirectly contributes to the concept of precision engagement and focused logistics.


PHALANX CIWS OT&E was conducted in the early 1980s for the Block 0. Block I OT&E was conducted in 1990 and the system was determined to be operationally effective. Block I systems are in the fleet. In FY96 COMOPTEVFOR was conducting an OA, based on at-sea testing, to support fleet introduction of the Block IA upgrade. However, in our FY96 report, we did not report an assessment of the OA because analysis had not been completed. We removed this program from oversight, based on the fact that procurement was complete and the only testing remaining was in support of a decision for relatively few upgrade kits


At-sea DT of the Block IA upgrade was conducted on the sea test range at Point Mugu, CA in FY96, with the Block 1A CIWS on the Self Defense Test Ship (SDTS). The SDTS was unmanned and controlled remotely during target engagements due to safety restrictions. Both CIWS tracking and firing tests were conducted, using anti-ship missiles, as well as surrogate targets to provide results for operational effectiveness assessment Testing was conducted on the USS SYLVANIA (ASF 2) to provide results for operational suitability assessment. The OA was conducted in accordance with a DOT&E-approved TEMP and OA plan and testing was observed by DOT&E staff representatives.


Testing was adequate, within the constraints of available resources, to assess operational effectiveness and operational suitability.

Based upon test results, CIWS Block IA is considered operationally effective against certain ASCMs, and potentially operationally effective against others. CIWS Block IA is operationally suitable.

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