What can the planes do?
The P-8I—a military variant of Boeing 737-800 commercial jetliner—is fitted with state-of-the-art sensors and radars for maritime surveillance and reconnaissance, and to snoop on submarines. It can also be fitted with the Harpoon all-weather anti-ship missiles made by Boeing.
The aircraft–a variant of the U.S. navy’s P-8A Poseidon plane–can also be used for anti-piracy and other intelligence operations. It was deployed in 2014 when India joined the multinational search for the missing Malaysia Airlines Flight 370. It is currently being used in the search for an Indian air force AN-32 aircraft that went missing on Friday over the Bay of Bengal.