There are actually many ways that someone who feels they've suffered a sexual misconduct of any kind can report that. If they find themselves in danger, of course, immediately they have access to 911, as do all Canadians. They also have access to civilian police if they're off a base, and civilian medical facilities.
On base, or within the Canadian Forces workplace, if it's outside of hours, they have a 1-800 assistance program; the military police, who have victims services available to them; the chain of command; or health services on base as well. All of these, both civilian and military, are available to anyone who believes they've suffered sexual misconduct.