takeoff_heights ={
    .1 = 21.0,
    .2 = 18.0,
    .3 = 12.0,
    .5 = 12.0,
    .6 = 3.0,
    .9 = 15.0,
    .11 = 6.0,
    .14 = 9.0,
    .16 = 9.0,
    .17 = 3.0,
    .18 = 6.0,
    .19 = 9.0
}