CanPass or CANPASS or Can Pass or however the heck the gov't writes it out, is a "pass" to get into Canada easier. I don't know the details of it, but know that it was requested by "our" new boss for our whole family.
You fill out a three page form, including Passport info and copy, five year residence and job history (which for us included a lot of extra paper. Ugh) and details of the airport/FBO of arrival, company, aircraft make/model/year/N#, etc., etc.
You can get CanPass for private, corporate, airline travel and boats.
It is to speed up customs when you arrive.
CANPASS site
I'll explain using "our" boss in quotation marks sometime...it's complicated.