The VHF/UHF Antenna Line of Sight app is a great tool to calculate the total line of sight distance for the Radio Horizon using the height of two antennas, as well as calculating EIRP using watts, dBw, and dBi. Calculators • Antenna Line of Sight • EIRP • Pure ERP Area Converters • Square Inches and Shorter Conversion • Square Feet & Yards & Meters Conversion Distance Converters • Inches & Centimeters & Millimeters Conversion • Feet & Yards & Meters Conversion • Nautical Miles, Statue Miles and Kilometers Conversion Volume Converters • US/Imperial to Metric Units Conversion • Metric to US/Imperial Units Conversion • Inches & Centimeters Volume Conversion • Feet, Yards, & Meters Volume Conversion This app features: • Send your calculations or conversions by email • Universal App (iPhone, iPod Touch, and iPad) • Retina Display graphics • Fast app switching • Automatically Saves Your Inputs • Latest version of iOS is supported • iPhone 6, 6+, 5 screens and the original 3.5 inch screen are supported No network connectivity required.