Swiss federal law SR 0.784.403.1, Q-Codes
“ QTJ* What is your speed? (Requests the speed of a ship or aircraft through the water or air respectively.) My speed is ... knots (or kilometres per hour or ... statute miles per hour) . (Indicates the speed of a ship or aircraft through the water or air respectively.) QTK* What is the speed of your aircraft in relation to the surface of the Earth? The speed of my aircraft in relation to the surface of the Earth is ... knots (or ... kilometres per hour or ... statute miles per hour) . ”
