The single-engine Cessna 180 vanished on Aug. 20, 1959, with pilot Ray Gran and Saskatchewan conservation officer Harold Thompson onboard.
They were on a short flight from Buffalo Narrows to La Loche to investigate poaching and deliver mail.
A private search, launched by Gran’s daughter and son-in-law, used sonar to find the wreckage of a plane in July 2018 in roughly 16 metres of water.
RCMP divers had originally planned to carry out their search of the northern Saskatchewan lake in August 2018.
They had to postpone the search after encountering a number of challenges, including strong winds, high waves, and low visibility.
The RCMP said at the time another potential dive would be attempted in the winter when they could use the ice as a staging area and visibility was expected to be better.
URT left for Peter Pond on Jan. 27 and will attempt the recovery dive this week.