passive towed arrays造句

• Some, but not all, vessels carry passive towed arrays, or combined active-passive arrays.
• The original intention was to build six undersea ocean-surveillance ships carrying a SURTASS passive towed array and a Low Frequency Active transducer array.
• It was planned to refit " Rhyl ", " Brighton ", " Berwick " and " Falmouth " with the very long range 2031 passive towed arrays which could listen for Soviet subs at ranges of plus.
• The ship's armament was replaced by a single 40 mm Bofors gun and two 12.7 mm machine guns, while the ship's stern was rebuilt to accommodate a hoist for a variable depth sonar, which was used to test various active and passive towed array sonars.
• An important addition to the Batch II group was a new Computer Assisted Command System ( CACS-1 ), replacing the CAAIS fitted to the Batch I ships . This could track up to 500 targets, including those detected by the ships passive towed array and ESM The most significant change in this group of six Type 22 frigates is much more sophisticated electronic warfare systems, particularly the outboard system for the intercept of Soviet naval and submarine communications.