Do you need passport to sail through the inside passage on your own vessel?

Being a former travel assistant, my understanding is as long as you are not stepping foot or DOCKING on a foreign land, the answer would be NO. I am presuming that you are sailing from America, up through the Alaskan Inside Passage, and are concerned about needing a passport for Canada. Once again, my understanding is as long as you do NOT dock or step foot on Canadian ground, you will NOT need a passport. Happy sailing!