http://files.dnr.state.mn.us/education_safety/safety/boatwater/lakesup_boatingguide.pdf
I attached a link to the Lake Superior Boater guide. There are several safety requirements you will need like flares, Horn and some more. They are listed in the manual.
I will say, If you find yourself in the fog make sure you are hitting your horn every minute of so. Radar is a great tool if you can afford it. You would be surprised how many boats wander around in the fog w/o radar nor hit their horn (if they even have one that is load enough).
Also, radio works by line of sight meaning higher antenna is better. Don’t skimp and a handheld or little 3′ whip antenna.