diff --git a/SSR/Aircraft_Info.h b/SSR/Aircraft_Info.h
index a44eb4f..44a5e76 100644
--- a/SSR/Aircraft_Info.h
+++ b/SSR/Aircraft_Info.h
@@ -194,8 +194,8 @@ public:
         // if (it.get_lat().has_value() && it.get_lon().has_value()) {
         //     return CPR::Position{it.get_lat().value(), it.get_lon().value()};
         // }
-        if (air_pos_track_list.empty()) return std::nullopt;
-        return air_pos_track_list.last();
+        if (surface_pos_track_list.empty()) return std::nullopt;
+        return surface_pos_track_list.last();
     }
     RET<double> select_heading() {
         GET_PRE(BDS60)
@@ -210,9 +210,13 @@ public:
         return w.get_magnetic_heading();
     }
     RET<double> altitude_meter() {
+
+
+
         GET_PRE(BDS05_airborne_position)
         return w.get_alt_meter();
     }
+
     RET<Vortex_Type> vortex_type() {
         GET_PRE(BDS08_id)
         return w.get_vortex_type();