Ships continued to search for Malaysia Airlines Flight 370 on Wednesday. They were looking in an area about 1,000 miles northwest of Perth. Ocean Shield is an Australian ship that has been looking for the jet's black boxes. Australian Maritime Safety Authority hide caption

itoggle caption Australian Maritime Safety Authority

The U.S. Navy's Bluefin-21 Artemis autonomous underwater vehicle as it was being hoisted on board the Australian Navy vessel Ocean Shield earlier this month. The Bluefin is being deployed to map the sea floor in the area of the southern Indian Ocean where the search for Malaysia Airlines Flight 370 is concentrated. It will look for any sign of the missing jet. MC1 Peter D. Blair/U.S. Navy hide caption

itoggle caption MC1 Peter D. Blair/U.S. Navy

Sgt. Trent Wyatt looks out an observation window on Friday from aboard a Royal New Zealand air force P-3 Orion maritime search aircraft as it flies over the southern Indian Ocean. So far there's been no sign of Malaysian Airlines Flight 370. But officials are hoping that sounds detected below the surface are coming from one or both of the plane's black boxes. Richard Wainwright/Reuters/Landov hide caption

itoggle caption Richard Wainwright/Reuters/Landov

A Royal Australian Air Force AP-3C Orion flew past the Australian defense vessel Ocean Shield on Wednesday as the search for Malaysia Airlines Flight 370 continued in the southern Indian Ocean. LSIS Bradley Darvill/Australian Defense Force/AP hide caption

itoggle caption LSIS Bradley Darvill/Australian Defense Force/AP

One of the objects searchers have spotted floating in the southern Indian Ocean as they look for Malaysia Airlines Flight 370. Nothing they've seen so far has been connected to the missing jet. Jason Reed/AP hide caption

itoggle caption Jason Reed/AP

The new search area for Malaysia Airlines Flight 370 is about 1,100 miles west of Perth, Australia. Previous search areas are shaded gray and were about 700 miles to the southwest. Australian Maritime Safety Authority hide caption

itoggle caption Australian Maritime Safety Authority

A Thai satellite snapped an image that shows about 300 objects floating in the southern Indian Ocean in the area now being searched for Malaysia Airlines Flight 370. This is part of that image. So far, searchers have not located any debris from the plane. Thai Ministry of Science and Technology/EPA/Landov hide caption

itoggle caption Thai Ministry of Science and Technology/EPA/Landov

Crew members on the Chinese icebreaker Xue Long scanned the southern Indian Ocean on Wednesday as they assisted in the search for Malaysia Airlines Flight 370. Earlier this year, the Xue Long assisted in the rescue of more than 50 scientists and paying passengers from a ship that got stuck in the Antarctic Ocean. Zhang Jiansong/Xinhua/Landov hide caption

itoggle caption Zhang Jiansong/Xinhua/Landov

Chinese relatives of the passengers onboard Malaysia Airlines flight MH370 wait for the latest information at Lido Hotel Sunday in Beijing, China. Lintao Zhang/Getty Images hide caption

itoggle caption Lintao Zhang/Getty Images

This satellite image, taken on March 18, has intensified the search for Malaysia Airlines Flight 370 in the Indian Ocean about 1,500 miles southwest of Perth, Australia. The image was released Saturday by Chinese authorities. /Reuters/Landov hide caption

itoggle caption /Reuters/Landov

Searching from the air and on the sea: The view Friday from a Royal Australian Air Force P-3 Orion. The Norwegian car transport ship Hoegh St. Petersburg is below. They're part of the search in the southern Indian Ocean for Malaysia Airlines Flight 370. Justin Benson-Cooper/pool/EPA/Landov hide caption

itoggle caption Justin Benson-Cooper/pool/EPA/Landov

Amid speculation and confusion about the missing Malaysia Airlines flight, Kuala Lumpur International Airport has a message board for the passengers and crew. Vincent Thian/AP hide caption

itoggle caption Vincent Thian/AP

At Kuala Lumpur International Airport on Friday, a woman writes on a banner full of messages about the 239 missing passengers and crew of Malaysia Airlines Flight MH370. Edgar Su/Reuters/Landov hide caption

itoggle caption Edgar Su/Reuters/Landov

The Malaysian air force, with help from about a dozen other nations, continues to search the seas on both sides of the Malay Peninsula for any sign of Flight 370. /Xinhua/Landov hide caption

itoggle caption /Xinhua/Landov

Scratching their heads: Malaysia's minister of transport, Hishamuddin Hussein (center), tried to answer reporters' questions Wednesday about the disappearance of Malaysia Airlines Flight 370. He was joined by Azharuddin Abdul Rahman, director general of the Malaysian Department of Civil Aviation, and Gen. Zulkifeli Mohd Zin. Wong Maye-E/AP hide caption

itoggle caption Wong Maye-E/AP

Adm. Mohd Amdan Kurish of the Malaysian Maritime Enforcement Agency Admiral, left, checks radar during a search for the missing Malaysia Airlines plane off Tok Bali Beach in Kelantan, Malaysia, on Sunday. Malaysian Maritime Enforcement Agency/AP hide caption

itoggle caption Malaysian Maritime Enforcement Agency/AP