I have taken that course - as the name says it is the Sail Canada Coastal Navigation
course, taught online. Good course, but probably not what you're looking for. For clarity, sailing and navigation
are taught as two separate skills.
The other basic certification
courses, as far as I am aware, all have an on-board component, otherwise they can't teach you to sail.
Unless you're talking about the PCOC - Pleasure Craft Operators' Card - required to operate any powered craft in Canada. Lots of online options for that one.