Note: Usage of this app requires a connection to Land-DAR equipment. See landdar.com for more information. Land-DAR is an aviation landing assistant. As you are descending, Land-DAR will call out the distance to the ground through the audio system of your aircraft. This app is a configuration tool for Land-DAR equipment. Land-DAR uses BLE to communicate; no pairing or bonding is required, simply open the app and you're ready to go!