It’s been several days since Australian vessel Ocean Shield detected ‘pings’ consistent with those from aircraft black boxes, like those on MH370. Unfortunately, the black boxes’ battery life might’ve expired, and they reportedly need to narrow down the location of the signals before they can send an unmanned submersible to scour the ocean floor. A diagram by the Washington Post shows just how challenging pinpointing that location is. Here’s an excerpt of it below.
The Ocean Shield’s towed pinger locator (below), which had been lowered to approximately 10,000 feet above the ocean floor, managed to pick up the black box signal for two hours on Sunday.
[Via the Washington Post]
But, as you can see from the full diagram here, there are many depth levels between the purported black box location, the pinger locator, and the Ocean Shield on the surface.
The search for MH370 has already been the costliest in history, surpassing the $160 million for Air France Flight 447 off the coast of Brazil in 2009.