Originally posted by Mr B.:

Originally posted by wizard_of_woz:

Don't need to go slow. Just need to pay attention and have quick reflexes.

Obviously not gone in a longboat and had thick fog.

Just a thought... when sailing in fog learn to sail using your minimap for navigation. Lets you keep away from the coastlines where you find most sandbars and islands.

Not 100% protection guaranteed... but rare enough that you don't die... Leviathans are the only real risk as they don't show on a map :)

You can even make the map zoom out and use it for long full speed journies in days of blind fog. :)