• Kayaking. Duluth lift bridge on the horizon.
    Technique,  Tutorial

    How Far Away is the Horizon

    APPARENT HORIZON: Where the sky appears to meet the Earth. (Also sea horizon.) Because of perspective effects, different observers generally have different apparent horizons. Because of refraction, even the sea horizon usually lies above the geometric horizon. -From the Atmospheric Optics Glossary. Knowing the distance to the horizon is handy when estimating how long it will take you to travel to a distant point. To accurately estimate to distance, understand that the apparent horizon changes based on the height of your eyes; the higher your eyes, the further you can see. That’s why it seems you can see forever when standing atop a mountain. Estimating the Distance to the Apparent…