As all executive power is legally reposed in the Canadian sovereign, the role of commander-in-chief is the only constitutional means by which decisions are made over the deployment and disposition of the Canadian Armed Forces.
As all executive power is legally reposed in Canada's Sovereign; these powers are exercised in Sovereign's absence (in Canada) by the Governor General, acting in the name of the Sovereign. Those powers include in Toto, the deployment and disposition of the Canadian Armed Forces.