Divers and Engineers Plan to Lift Plane From River

Divers and engineers recovering the wreckage from Saturday's crash over the Hudson River hope to raise the remains of a small plane out of the water this afternoon.

The plane that collided with a tour helicopter in the crowded skies between Manhattan and New Jersey was found Monday, 60 feet underwater. Nine people died in the midair collision.

VIDEO: Police release emergency calls from shocked eyewitnesses to the crash.Play

Searchers removed bodies of seven victims and the helicopter itself from the river Sunday, and divers now say they've found the body of an eighth person, an adult male, in the plane that remains underwater.

New York Police Department divers are working this morning to secure the plane with additional straps and chains so it can be lifted up.

NYPD divers and harbor officers met with the Army Corps of Engineers this morning to assess plans to pull the plane from the river this afternoon when river currents and visibility improve, NYPD Deputy Commissioner Paul Browne said.

Crowded Skies, No Directions

Midair CollisionPlay

As the remnants of the accident are recovered, critics are calling for more restrictions for flights within the crowded Hudson River corridor.

In that area over the river, aircraft flying below 1,100 feet are virtually on their own, with no air traffic controllers guiding them in the crowded airspace. National Transportation Safety Board chairwoman Deborah Hersman said it's the responsibility of pilots "to see and be seen and be aware of traffic around them."

VIDEO: Midair collision over Hudson River raises concerns over air traffic.Play

It's also a busy space: The area saw 225 flights every day in the week prior to the accident, investigators said.

"It is unconscionable that the FAA permits unregulated flights in a crowded airspace in a major metropolitan area," said Rep. Jerrold Nadler, D-N.Y., who serves on the House Transportation and Infrastructure Committee. "And it is ridiculous that private planes and helicopters flying through a crowded area are dependent, while in flight, on visually sighting other aircraft and communicating with them. The real-life repercussions of these non-existent regulations have been disastrous."

Hersman also said the pilot of the Piper Lance plane, Steve Altman, made a last-minute decision to fly over the Hudson when asked for his planned route by air traffic control.

VIDEO: Aviation expert John Nance explains when pilots cant see one another.Play

"ATC came back: 'Let me know so I know who to coordinate with,'" Hersman said. "And the pilot responded, 'OK, tell you what: I'll take down the river.'"

Investigators want to know if Altman was prepared for the congested and complicated airspace. They also believe that after the Piper left from Teterboro, N.J., airport, Altman may not have followed instructions to switch to the Newark airport frequency and check in with controllers there.

Investigators Hear Eyewitnesses Accounts of Midair Crash

Police have released some of the 911 calls from eyewitnesses to the Saturday crash.

The NTSB has also interviewed a pilot who was refueling his helicopter at West 30th Street. That pilot saw the Piper Lance heading toward the helicopter, and tried to warn the chopper pilot.

"He was obviously concerned enough to radio to let him know about the close proximity of the other traffic," Hersman said.

Five Italian tourists and a pilot were onboard the helicopter, owned by Liberty Helicopters, for what was expected to be a brief 12-minute tour from the air.

Accompanying Altman on the plane were his brother and nephew.

ABC News' Richard Esposito, Mark Crudele and Huma Khan, as well as WABC, contributed to this report.