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Modification History for the
Buttwil, Switzerland Control Points

• 15 May 15: Alpthal, Brünnelistock, Engelstock, and Oberägeri added.   Alpnach Mil, Ambri Piotta, Andeer, Bad Ragaz, Buochs, Corvatsch, Emmen Mil, Friedrichshafen, Goppenstein, Grenchen, Innsbruck, Interlaken Mil, Kallern, Langenthal, Madrisa, Maschwanden, Meiringen Mil, Partenen, Payerne Mil, Romainmotier, Samedan, Schänis, Sion, and Triengen removed.  
• 05 Oct 14: Ilec airspace file updated with AirParse Version 2.5
• 19 Jan 10: Magnetic Variation added
• 10 Mar 07: All new data, many changes, courtesy of Ueli Messmer
• 28 Apr 03: Amden, Imst, and St. Blasien moved.   Andeer, Arosa, Bedretto, Belalp, Belchentunnel, Beuron, Bielerhoehe, Birrfeld, Bluemlisalp, Brigels-Breil, Brunnen, Caiolo, Chasseron, Col De La Faucille, Col Du Mollendruz, Court, Davos, Diavolezza, Diesse, Dixance, Domodossola, Eggli B/Saanen, Einsiedeln, Elm, EP Kallern, Flamatt, Fort les Rousses, Furkapass, Gadmen, Gammertingen, Gelterkinden, Gemmi, Gletsch, Goesgen KKW, Gornergrat Bahn, Grindelwald, Hoernli, Hohe Winde, Klosters Platz, Klus, La Dole, Lenzerheide, Leuk, Linthal, Lodrino, Maloja, Matro, Merligen, Moutier, Muotathal, Mythen, Napf, Nauders, Obersee, Partenen, Pery, Plettenberg, Realp, Rellerli, Riggisberg, Samnaun, San Pietro, Sanetsch, Sarner See, Schallenberg, Scheidegg Grosse, Schlierental, Schruns, Schwaegalp, Schwanden GL, Schwarzenburg, Simplonpass, Sonceboz, Spillgerten, Spluegen, ST. Niklaus, Stalden VS, Sustenpass, Sustenpass, Thusis, Thyon 2000, Tirano, Titisee, Todtmoos, Tonale, Trubschachen, Wangen A/Aare, Welschenrohr, Wil SG, Winzeln-Schramberg, Wispile, Wolhusen, and Zernez added.   Alzate Brianza, Amlikon, Arlbergpaß, Auberson, Bellechasse, Blaubeuren, Bludenz, Blumberg, Bremgarten, Chatel St. Denis, Courtelary, Geisingen, Hasenstrick, Hochdorf, Holderstock, Münster SW, Motiers, Oberstdorf, Pischa, Pontarlier, Porrentruy, Rigi Kulm, Roemerswil, Samedan, Schaenis, Schongau, Schwenningen, Seefeld, St. Hippolyte, Stuben Arlberg A, Thun Allmend, Trogen, Uetliberg, Uster, Valzeina, and Wohlen AG removed.
• 21 May 02: ZL 16 -> ZL 160 and ZL 34 -> ZL 340.
• 13 May 02: All new data, many changes

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