Just read an interesting article and the writer was explaining all the different 11 meter band plans in europe and else where. Many plans are the same as ours and many overlap higher and lower. Its interesting is see that industry uses the band, taxi's, truck, citizens as well. Most odd is church broadcasts are mentioned as well as fishing boats and others
My point being is that scanning the 11 meter for propagation would seem to be a good place to check propagation as there are alot of users.
Google HF underground-11 meters to get a wikipedia page.