Both Dense Fog and Freezing Fog Advisories pose significant risks to travelers. Reduced visibility in dense fog can make driving, boating, and flying dangerous. Freezing fog adds the additional hazard of light ice accumulation on roads, vehicles, and other surfaces, increasing the risk of accidents. Mariners should note that visibility limits for Dense Fog Advisories on water are regionally defined and do not exceed one nautical mile. It is crucial to exercise caution and avoid unnecessary travel during these conditions to ensure safety.