Three men who were on board the helicopter, including the commander of the icebreaker Amundsen, died in the crash.
Post-mortem examinations have suggested the men likely survived the impact, but later died of hypothermia after being in the frigid water for about one hour.
The Coast Guard says it will be difficult to find and recover the helicopter in harsh weather and ice conditions, but the crews of the ships will make every reasonable effort to get the job done.
The Messerschmitt Bo-105 helicopter crashed Sept. 9 in the M'Clure Strait and sank during a routine patrol to check ice conditions.
The Transportation Safety Board of Canada is investigating the accident.