"ATC: "Oh, just wondering, 'cos you have set a new European record......237Nm to top-of-climb""
"...it joins the exclusive club populated previously by the 747-100 alone of climbing solely due to the curvature of the earth... "
Even worse! Climbing with the curvature of the earth over a distance of 237NM should bring you to about FL500 !
:-)
L.