Which statement best describes CIWS?

• A. CIWS is a long-range missile defense system.
• B. CIWS is used for anti-submarine warfare.
• C. CIWS is a Close-In Weapons System designed to defend a ship from incoming missiles and aircraft at close range.
• D. CIWS is a navigation system.

Answer: (C)

CIWS stands for Close-In Weapons System and its purpose is to provide a ship’s last line of defense against threats that come in very close, such as incoming missiles and aircraft. It uses sensors like radar and optical systems to automatically detect, track, and engage targets, then fires a rapid-fire weapon—typically a rotary cannon—to create a dense, high-speed wall of projectiles that can destroy or deflect the threat before it can strike the ship. This role is inherently short-range and automatic, designed for point defense rather than long-range engagement. That’s why it’s not used for anti-submarine warfare, which relies on sonar and underwater weapons, nor for navigation, which involves plotting course and sensing the surroundings. The description captures its function as a close-range shield specifically against missiles and aircraft.