The Sydney NS port Authority is reporting Tugs Atlantic Elm and Fir In Sydney. Both were recently in Quebec, But may have been assigned to bring the Athabaskan back to Halifax..
UPDATE 04/01: Shipfax is reporting Ocean Tugs have headed for home. The Speculation is that Atlantic Towing Dispached their tugs based on the assumption that the contract would be re-tendered.
Photo (left) courtesy Sydney Port Authority via twitter.