The mast has been fits-under-a-16-meter-tall-bridge-at-low-tide tall so far...
Or 15m + vhf antenna if you go by the drawings.
Nice long chunk of French NG-51 extruded aluminum

But for your community lemmy doesn't seem to play nice with pbin posts so I won't see them on my daily scroll 💔
I'll try posting and see what that might do.