WHOI Joins Search for AF447

Flight 447, a scheduled commercial flight from Rio de Janeiro to Paris, crashed into the Atlantic Ocean on 1^st June  2009, carrying 216 passengers and 12 crew members.  Searchers have been unable to locate the aircraft in three attempts since then. Hydro International has published about this incident in July/August 2009 and in November 2009 on the deepwater black box retrieval .

The search is being targeted in an area of about 3,900 square miles (10,000 square kilometres), several hundred miles off Brazil’s north-eastern coast. The team plans to begin searching areas it did not search last year and intends to completely survey the entire search zone until the wreckage is located.

The recovery mission, aboard the vessel Alucia, left the harbor of Suape, Brazil on 22nd March with a crew of 34. It will include the use of three autonomous underwater vehicles (AUVs), the REMUS 6000s, designed and operated by WHOI. Two of the vehicles are owned by the Waitt Institute for Discovery; the third is owned by IFM-GEOMAR of Germany.

These autonomous undersea vehicles are designed to operate in depths up to 6,000 metres (19,685 feet or 3.73 miles). As each vehicle covers an area in a “mowing” type pattern, it employs side-scan sonar to survey up to 600 metres to its left and right. Capable of staying underwater for up to 20 hours at a time, REMUS then returns to the ship, where scientists immediately download its data. If the data contains evidence of any debris or other items of interest undersea, a REMUS 6000 will be dispatched to gather more detailed, up-close images using high-resolution cameras located on the bottom of the vehicle.

WHOI Senior Engineer Mike Purcell is the chief of sea search operations for the mission. Addressing members of the media earlier in the week, Purcell said his team is confident in the ability of the REMUS vehicles to find the wreckage.

While the search is underway, the BEA will issue a weekly progress report on its website, providing families, the media and the general public with an updated operation status produced by WHOI.

"There is no better team or technology available to handle this mission," said Gallo.  “The plane was lost over the Mid-Ocean Ridge, a feature that we have been exploring for more than 30 years.  The terrain will be extremely rugged and the search will be difficult, but this is something that we have been doing as a part of our mission to explore and understand the global oceans.”

Image: Three REMUS 6000 vehicles will be utilised in the search for the wreckage of Air France Flight 447. The vehicles will use side-scan sonar to map the ocean floor in long overlapping lanes, using a survey process known as “mowing the lawn.” After the data from large-scale surveys are analysed and smaller fields of interest are identified, the REMUS 6000s can then gather more detailed, up-close images on subsequent dives using their high-resolution cameras. (Photo by Mike Purcell, Woods Hole Oceanographic Institution).