I'm always excited to see toolkit or supplementary offerings that aren't adventures!
The conceit of the red and green fires is super clever and believable as something that survivors of this fog apocalypse would adopt. Crucially, the encounters understand that FatherFog doesn't need a stat block or mechanic for every situation and the ones provided are fun and evocative.
The core game describes seafaring as a terrifying pursuit and I think this pamphlet properly represents that while also providing everything a Guide might want to spark a lot more ideas than one might think from such a small package. Well done!