KUALA LUMPUR, April 11 — The detection of faint acoustic signals from the Indian Ocean over the last few days have given fresh hope to a multinational hunt for the missing Malaysia Airlines flight MH370.

Australia has already confirmed that the first two out of four signals detected have a frequency of 33.331kHz, consistent with a flight data recorder’s patterns.

An unmanned underwater vehicle, the Bluefin-21, may be deployed as early as tomorrow, according to US Navy Commander William J. Marks even as two ships, the Chinese Haixun 01 and Australian Ocean Shield, both fitted with pinger locators seek to pinpoint the location of the electronic pulses.

The robot submersible can be fitted with either a sonar device or a camera.

Should the signals match the black boxes mounted on board MH370, the underwater challenges to recover its wreckage remain daunting, as can be seen in the infographic below: