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MH370: After Aborted Underwater Search, Crews Hope to Try Again
April 15th, 2014
04:30 AM ET

MH370: After Aborted Underwater Search, Crews Hope to Try Again

Time to try this again.

The first deployment of an underwater vehicle to hunt for Malaysia Airlines Flight 370 was aborted early, sending the drone back to the surface 10 hours before expected.

Search officials analyzed data from the Bluefin-21's six hours underwater, and found no objects of interest, the U.S. Navy said Tuesday.

Crews will try to send the Bluefin-21 probe back into the Indian Ocean later Tuesday, weather permitting.

So what went awry the first time?

"In this case, the vehicle's programmed to fly 30 meters over the floor of the ocean to get a good mapping of what's beneath and to the sides, and the chart we have for the area showed that water depth to be between the 4,200 and 4,400-meter depth," said Capt. Mark Matthews, who heads the U.S. presence in the search effort.

But the water was deeper than expected - about 4,500 meters.

"Once it hit that max depth, it said this is deeper than I'm programmed to be, so it aborted the mission," Matthews said.

David Kelly, CEO of the company that makes the Bluefin-21, said the device's safety mechanisms have triggered such recalls have happened.

"Although it's disappointing the mission ended early, it's not uncommon," Kelly said. "We've operated these vehicles around the globe. It's not unusual to get into areas where the charts aren't accurate or you lack information."

Mathews said the initial launch Monday night took place "in the very far corner of the area it's searching, so they are just shifting the search box a little bit away from that deep water and proceeding with the search."

It is unclear how much of the area - 5 kilometers by 8 kilometers (3.1 miles by 4.9 miles) - the Bluefin scanned during its first attempt. It could take up to two months to scan the entire search area.

MORE on CNN.com.

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