Annan gives a U.N. flag to a relative of a crash victim during a ceremony at the United Nations

HALIFAX, Nova Scotia (CNN) -- Searchers recovered Swissair 111's cockpit voice recorder from the waters of the North Atlantic Friday night, which could shed new light on the doomed jet's last moments.

Canadian military spokesman Maj. Tim Dunne said the recorder, one of the plane's so-called "black boxes," was found about 6 p.m. (5 p.m. EDT/2100 GMT) in the search area off Peggy's Cove, Nova Scotia. It was brought to the surface by divers.

The other black box, the flight data recorder, was recovered four days ago. A laboratory examination revealed it was missing information from the flight's last six minutes, an indication that the plane may have lost its electric power before it crashed, killing all 229 people aboard.

The Swissair 111 crash victims were remembered with flowers during a memorial service at St. Peter's Cathedral in Geneva

The cockpit voice recorder was found 180 feet (55 meters) below the ocean surface, near where the data recorder was found, transportation officials said.

Although investigators already have a transcript of the conversation between the Swissair pilots and air controllers, the voice recorder may have picked up additional conversation between the two pilots, or irregular noises in the aircraft.

Stored in a box of fresh water to preserve it, the voice box was sent to Ottawa for analysis. Its condition was not immediately known, transportation board officials said.

'We share your grief'

Swissair 111 was en route from New York to Geneva when it crashed while trying to make an emergency landing in Halifax.

On Friday, victims of the September 2 crash were mourned and remembered at memorial services in New York City, Geneva and Zurich.

In New York, nine United Nations workers who died in the crash off the coast of Nova Scotia were remembered at a one-hour service, during which Secretary-General Kofi Annan handed the family of each victim a folded U.N. flag.

"We share your grief all the more, because the deaths of these nine exceptional people, on a flight so familiar to many of us that we called it the U.N. airbus, come as a deep blow to their other family, too -- that which we call the United Nations family," Annan said.

In Geneva, hundreds of Swiss mourners filled historic St. Peter's Cathedral.

"The tragedy of Halifax has just sadly reminded [us] of the fragility of our life and the absurdity of our frantic lifestyles," Swiss President Flavio Cotti said.

Cotti was joined at the service by Phillippe Bruggisser, chief executive of Swissair's parent company.

Other government officials and Swissair representatives took part in a simultaneous service in St. Peter's Church in Zurich. Switzerland declared a week of mourning for the victims, and flags have been lowered to half staff.