India on Wednesday signed an over USD 1 billion deal with American defence and aerospace major Boeing for procuring four additional 'Poseidon-8I' long-range maritime surveillance and anti-submarine warfare aircraft. 

The contract is a follow-on order to eight P-8I planes already bought by India in a direct deal with the firm worth USD 2.1 billion, defence sources said. 

The acquisition of additional 'P-8I' will be a shot in the arm of the Indian Navy as the country has been building up its naval surveillance capabilities. 

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Here's all you need to know about the aircraft: 

The contract was inked during the ongoing visit of US Under Secretary for Defence on Acquisition Frank Kendall, and is seen as a sign of growing Indo-US defence ties, they said. 

Source: b'Source: Twitter\xc2\xa0'

Incidentally, India was 'P-8's first international customer and was also Boeing's first military sale to India. The P-8I fleet is based at the Naval Air Station Rajali in Tamil Nadu.

India had last year signed a USD 3 billion contract with the US through Foreign Military Sales route for 22 Apache and 15 Chinook helicopters. 

With this deal, the total value of defence deals signed with the US in the last one decade comes to around USD 15 billion. 

India is also working on a deal to get 145 pieces of M777 light-weight howitzers from the US, the sources said. 

(Feature image source: Twitter)