The U.S. Defense Department is likely to pursue a brand  new design for its next nuclear-armed submarine, following a Navy  recommendation during a key program review earlier this month, according  to experts and observers.
The Pentagon's Defense Acquisition Board on December 9 completed an  initial design review meeting on the so-called "SSBN(X)" effort,  spokeswoman Cheryl Irwin confirmed last week. However, she indicated the  department was not ready to release the review's results.
If approved by defense acquisitions czar Ashton Carter, the  replacement submarine for today's Ohio-class ballistic missile vessels  would enter its first major acquisition program phase, called "Milestone  A."
A recent Congressional Research Service report  estimated it would cost roughly $70 billion to replace the 12 ballistic  missile submarines expected to populate the U.S. fleet by the end of  this decade. The nation currently fields 14 Ohio-class boats.
The Navy has not released total cost projections for the new  underwater craft, but has estimated it would spend $29.4 billion on the  effort between fiscal 2011 and 2020. That figure, though, excludes costs  for roughly two subsequent decades during which the 12 new submarines  would be built and delivered.
The next-generation submarine is to  initially carry today's Trident D-5 nuclear-armed ballistic missiles,  but later could be fitted with new-design nuclear missiles and possibly  conventional weaponry.
The first Ohio-class submarine to be replaced reaches the end of its  42-year service life in 2027. One subsequent vessel is slated to retire  each year after that, with the last submarine expected to age out in  2040. The SSBN(X) submarines are to enter the fleet between 2029 and  2042.
One pivotal decision believed likely to come out of the Defense  Acquisition Board review pertains to the approach the Navy will take in  developing and building the replacement submarine. In an official  "analysis of alternatives" that also has not been released, the Navy  considered three possible design concepts for the Ohio-class follow-on,  according to a recent Energy Department report.























 
 

 
 
















 

 
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