All of the Canadian marine weather bulletins define fog as implying visibility of less than 1 NM. We’ve certainly been experiencing plenty of that coming down around Cape Caution into the Broughton Archipelago, with visibility often less than 1/8th mile.
It started In earnest coming out of Shearwater to Pruth Bay. It continued the next day around Cape Caution to Blunden Harbor. And then more the following day down the Queen Charlotte Strait to Lagoon Cove.

Actually, it cleared up for a bit in Queen Charlotte Strait the other day, but then we saw this wall of fog shown above guarding the entrance to the Broughtons.
Fortunately it tends to dissipate in the afternoon, revealing views like this.
We are in it again this morning, heading down Johnstone Strait to the Octopus Islands. The good news is that, in our experience, winds tend to be low and seas calm in foggy conditions.