A system for calibrating aircraft position by providing touch-enabled selection of onboard sensors on an aircraft having a touch-enabled display unit, the system comprising: a number N of position computers, N being greater than 1; a plurality of onboard sensors for providing respective sensor data, the onboard sensors including a global position system sensor, an inertial reference system sensor, a radio navigation sensor, and, for each of the N Position computers, a respective FMS sensor that is a blended position sensor that calculates a blended position using other available sensors; a controller circuit comprising a processor configured to execute programming instructions stored in a memory, that when executed by the processor cause the controller circuit to: receive sensor map location information for the onboard sensors; receive sensor data from the onboard sensors; configure a user interface layout for the touch-enabled display unit based on the sensor map location information and the sensor data, the user interface layout presenting the N Position computers, the GPS sensor, the IRS sensor, the NAV sensor, and the N FMS sensors, using symbols (302, 311, 312, 314, 316, 318, 320, 322) at respective locations; render the user interface layout on the touch-enabled display unit; interpret a touch input from the touch-enabled display unit to select a Position computer and to select an onboard sensor; calibrate the selected Position computer with the selected onboard sensor responsive to the touch input; modify the user interface layout to reflect the calibration; and modify a displayed range ring on the user interface layout responsive to the calibration. a number N of position computers, N being greater than 1; a plurality of onboard sensors for providing respective sensor data, the onboard sensors including a global position system sensor, an inertial reference system sensor, a radio navigation sensor, and, for each of the N Position computers, a respective FMS sensor that is a blended position sensor that calculates a blended position using other available sensors; a controller circuit comprising a processor configured to execute programming instructions stored in a memory, that when executed by the processor cause the controller circuit to: receive sensor map location information for the onboard sensors; receive sensor data from the onboard sensors; configure a user interface layout for the touch-enabled display unit based on the sensor map location information and the sensor data, the user interface layout presenting the N Position computers, the GPS sensor, the IRS sensor, the NAV sensor, and the N FMS sensors, using symbols (302, 311, 312, 314, 316, 318, 320, 322) at respective locations; render the user interface layout on the touch-enabled display unit; interpret a touch input from the touch-enabled display unit to select a Position computer and to select an onboard sensor; calibrate the selected Position computer with the selected onboard sensor responsive to the touch input; modify the user interface layout to reflect the calibration; and modify a displayed range ring on the user interface layout responsive to the calibration. receive sensor map location information for the onboard sensors; receive sensor data from the onboard sensors; configure a user interface layout for the touch-enabled display unit based on the sensor map location information and the sensor data, the user interface layout presenting the N Position computers, the GPS sensor, the IRS sensor, the NAV sensor, and the N FMS sensors, using symbols (302, 311, 312, 314, 316, 318, 320, 322) at respective locations; render the user interface layout on the touch-enabled display unit; interpret a touch input from the touch-enabled display unit to select a Position computer and to select an onboard sensor; calibrate the selected Position computer with the selected onboard sensor responsive to the touch input; modify the user interface layout to reflect the calibration; and modify a displayed range ring on the user interface layout responsive to the calibration.