INTRODUCTION TO SONAR 



word dash is formed from the underlined letters 

 of the term drone antisubmarine helicopter.) 

 (See fig. 2-8.) It is a pilotless, remotely con- 

 trolled helicopter, capable of carrying 2 homing 

 torpedoes or a nuclear depth charge to a target 

 several miles away. 



The ASROC is the shipboard counterpart of 

 the submarine's SUBROC. It is a solid-fuel 

 rocket that carries either a homing torpedo or 

 a nuclear depth charge to a range of 5 miles. 

 Like the SUBROC, it is unguided during fUght. 

 When the torpedo is used, a parachute slows 

 its descent to the surface. On contact with the 

 sea, the parachute separates and the torpedo 

 begins its active acoustical search. 



The destroyer escort USS Voge (DE 1047), 

 shown in figure 2-9, is one of the newest ships 

 in the modern design DE 1040 class. She carries 

 ASROC and A/S torpedoes, and will evaluate 



a new naval tactical data system (NTDS) for 

 antisubmarine warfare (ASW) application. 



All the destroyer-type ships mentioned have 

 the latest sonar equipment compatible with the 

 type of ship. The newer ships have bow-mounted 

 sonars. Some ships also have variable-depth 

 sonar (VDS) installed on the stern. 



Practically all destroyer-type ships are con- 

 ventionally powered, the exception being the few 

 ships in the USS Bainbridge (DLGN 5), which 

 have nuclear-powered propulsion systems. The 

 Navy of the future, however, will doubtless have 

 a greater proportion of nuclear-powered sur- 

 face ships, just as our submarine force has 

 today. Conventional destroyers mast refuel every 

 few days, restricting their freedom of movement. 

 In contrast, the Bainbridge , in company with 

 USS Enterprise (CYAN 65) and USS Long Beach 

 (CGN 9), made a 30,000-mile voyage around the 

 world without refueling or replenishing supplies. 



Figure 2-11.- 



134.95.5 

 -S-2 Tracker, A/S search and attack aircraft, with MAD probe extended. 



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