Operation
The CIWS is designed to be the last line of defense against anti-ship missiles. Due to its design criteria its effective range is very short relative to the range of modern ASMs, from 1 to 5 nautical miles (9 km). The gun mount moves at a very high speed and with great precision. The system takes minimal inputs from the ship, making it capable of functioning despite potential damage to the ship. The only inputs required for operation are 440 V AC 3 phase at 60 Hz and water for electronics cooling. For full operation including some non-essential functions, it also has inputs for true compass ship's heading and 115 V AC for the PASS and tape drive subsystems.
Read more about this topic: Phalanx CIWS
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—Thomas Henry Huxley (1825–95)
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