Construction of the first Columbia-class sub is scheduled to start in 2021, with the US navy taking delivery from 2028.
Australian maritime warfare expert James Goldrick told nine.com.au the US is determined to keep its edge in submarine technology.
Despite recent developments in underwater detection, submarines remain difficult to pinpoint, he said.
“The sea is a very complex medium. It remains the most impenetrable environment, and I think the US is banking on this continuing.”
And Rear Admiral Goldrick said despite Russia and China unveiling new planned nuclear weapons, the US maintains an advantage in submarine technology.
Putin claims new weapons could strike ‘anywhere in the world’
“The Americans are well ahead of the Chinese. The Russians, however, have become well advanced in modernising their submarine fleet.”
The Columbia-class vessels are due to replace the US navy’s current Ohio-class SSBN fleet.
Technical details of the new vessels remain sketchy, but they are set to be the biggest sub the US navy has ever commissioned, The Diplomat reports.
Designed by General Dynamics Electric Boat, they measure 171m and have a beam of 13m.
The first sub delivered to the US Navy will cost $US14.5b, according to the Congressional Research Office. The remaining 11 vessels are estimated to cost $US8b.https://www.9news.com.au/world/2018/03/16/12/12/new-us-nuclear-submarines-to-have-one-hundred-billion-dollar-price-tag
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