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美国在1957财政年度计划中打算建造6艘攻击型核潜艇,而最初计划这6艘攻击型核潜艇全都是“鲣鱼”级。但是,由于当时美国核潜艇建造能力有限,无法应付大量核潜艇的建造,只好把第6艘的完工日期向后拖延。这种情况反倒使得美国海军腾出了比较多的时间来考虑对“鲣鱼”级核潜艇的设计进行一定程度的改进。对“鲣鱼”级核潜艇进行改进的首要目标是加大艇的下潜深度,并在艇上装备一种新型声呐系统。这种新型声呐系统包括圆柱形主动声呐基阵和被动保角声呐,更加适于装备在水滴形潜艇上。美国海军期望新型声呐的探测距离能够达到海底多次反射距离或者海面多次反射距离(当时估计该距离大约为45700米),但是小于会聚区距离(约为63980
The United States intends to build six offensive nuclear submarines in the 1957 fiscal year plan, while all six of the attack nuclear submarines were originally planned to be “bonito” class. However, due to the limited capacity of the U.S. nuclear submarine at the time to cope with the construction of a large number of nuclear submarines, the completion date of the 6th vessel was delayed. Instead, the U.S. naval forces made more time to consider some improvements in the design of the “bonito” class submarine. The primary goal of improvements to the “bonito” class nuclear submarines is to increase the depth of the boat's dive and equip the boat with a new type of sonar system. This new sonar system includes a cylindrical active sonar array and passive conformal sonar, more suitable for equipment on the drop-shaped submarine. The U.S. Navy expects the detection range of the new sonar to reach the seafloor multiple reflection range or sea surface multiple reflection range (estimated at 45700m at that time) but less than the convergence zone distance (about 63980