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         Frigate: warship used as anti-submarine 
          escort. 
          Whip antenna: whip-shaped antenna used for sending and receiving 
          waves. 
          Radar antenna: apparatus used to receive radar waves. 
          Masthead light: light at the top of the mast. 
          Air warning radar: surveillance radar. 
          Gun director: apparatus used to aim a gun. 
          Anchor: steel or iron hook, attached to the ship by a chain, 
          that holds the ship in place by hooking it to the bottom of a body of 
          water. 
          Automatic turret: armored shelter. 
          Gun control: device used to aim the fire. 
          Antenna mast: post supporting the antenna. 
          Stack: device used for expelling smoke. 
          Lifeboat: small boat used in emergencies. 
          WASP helicopter: apparatus balanced and propelled by large rotors. 
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