How Kennedy's Plane Was Found
BBC News

US Coast Guard patrol the area off Martha's Vineyard
The body of John F Kennedy Jnr and parts of his plane's fuselage were located after four days of round-the clock searching.
Hampered by strong currents and cold temperatures, US Navy and Coast Guard salvage and search teams combed the waters around near Martha's Vineyard, off the coast of Massachusetts.
The single engine Piper Saratoga plane, which reportedly lay 30m deep, was discovered by remote-controlled submersible vehicles using sonar, rather than by diving teams.
The remains and wreckage were found at night, but officials kept the details secret for several hours out of respect for the family.
Experts are still deciding how best to conduct the salvage operation.
Four ships involved
Divers from the Massachusetts State Police and the Navy salvage vessel USS Grasp were part of the underwater search effort.
Also involved were the Rude, a National Oceanic and Atmospheric Administration research ship, the NOAA's Whiting, and the Coast Guard cutter Willow.
Working in visibility of less than eight feet, the divers were only able to search for 15 minutes at a time, due to the depth of the water.
Beneath the ocean's surface, the operation had to contend with crabs, octopus, seaweed and debris.
One object that sonar maps showed might have been a piece of the plane turned out to be a 14-foot rock.
'Splash point' located
Divers initially honed down the number of target sites being searched to just two, using radar information that indicated where the plane hit the water.
"We have a theoretical splash point that we feel very good about," said Admiral Richard Larrabee of the US Coast Guard.
The "splash point" lay around 11km south of Gay Head on Martha's Vineyard, officials said.