Lake Superior offers challenging and often dangerous weather in the form of dense fog, high winds, waves, and thunderstorms. Combine this with rocky reefs, limited safe harbors, and Isle Royale's remoteness, and its pays for you, your crew, and your boat to be shipshape. Isle Royale's geology can make navigating its waters treacherous to the unexperienced or uninformed boater. There are numerous hidden shoals and underwater reefs that create hazards. A waterproof lake chart of the waters around Isle Royale National Park is recommended.
- Use Marine 16 on your marine radio.
- Contact the U.S. Coast Guard or the Rock Harbor or Windigo Visitor Centers (when staffed).