diff --git a/src/main/lemondronor/advisorycircular.cljs b/src/main/lemondronor/advisorycircular.cljs
index e28b5dd..5169f65 100644
--- a/src/main/lemondronor/advisorycircular.cljs
+++ b/src/main/lemondronor/advisorycircular.cljs
@@ -149,7 +149,7 @@
   (let [icao (:icao ac)
         new-history-entry {:lat (:lat ac)
                            :lon (:lon ac)
-                           :alt (:geom-alt ac)
+                           :alt (max (:geom-alt ac) (:alt ac))
                            :gnd? (:gnd? ac)
                            :time (:postime ac)}]
     (if (contains? db icao)
@@ -240,7 +240,7 @@
 (defn ac-desc [ac]
   (str (:icao ac) " " "http://tar1090.adsbexchange.com/?icao=" (:icao ac)
        " " (:lat ac) " " (:lon ac)
-       " " (:registration ac) " " (:geom-alt ac) " " (:curviness ac) " "
+       " " (:registration ac) " " (:alt ac) " " (:curviness ac) " "
        (:normalized-curviness ac)))
 
 
@@ -571,7 +571,7 @@
    :geometry
    {:type "LineString"
     :coordinates (map (fn [pos]
-                        [(:lon pos) (:lat pos) (util/feet-to-meters (:geom-alt pos))])
+                        [(:lon pos) (:lat pos) (util/feet-to-meters (:alt pos))])
                       coords)}})