diff --git a/public_html/config.js b/public_html/config.js
index 505d516..7e35039 100644
--- a/public_html/config.js
+++ b/public_html/config.js
@@ -40,6 +40,20 @@ SiteLon     = 9.0;
 SiteName    = "My Radar Site"; // tooltip of the marker
 
 
+// Extra map types to include. These work for maps with 256x256 tiles where a
+// URL can be constructed by simple substition of x/y tile number and zoom level
+var ExtraMapTypes = {
+        'OpenStreetMap'    : 'http://tile.openstreetmap.org/{z}/{x}/{y}.png',
+        // NB: the following generally only cover the US
+        'Sectional Charts' : 'http://wms.chartbundle.com/tms/1.0.0/sec/{z}/{x}/{y}.png?origin=nw',
+        'Terminal Charts'  : 'http://wms.chartbundle.com/tms/1.0.0/tac/{z}/{x}/{y}.png?origin=nw',
+        'World Charts'     : 'http://wms.chartbundle.com/tms/1.0.0/wac/{z}/{x}/{y}.png?origin=nw',
+        'IFR Low Charts'   : 'http://wms.chartbundle.com/tms/1.0.0/enrl/{z}/{x}/{y}.png?origin=nw',
+        'IFR Area Charts'  : 'http://wms.chartbundle.com/tms/1.0.0/enra/{z}/{x}/{y}.png?origin=nw',
+        'IFR High Charts'  : 'http://wms.chartbundle.com/tms/1.0.0/enrh/{z}/{x}/{y}.png?origin=nw'
+};
+
+
 // -- Marker settings -------------------------------------
 
 // These settings control the coloring of aircraft by altitude.
diff --git a/public_html/script.js b/public_html/script.js
index f79c8ca..79a3e2d 100644
--- a/public_html/script.js
+++ b/public_html/script.js
@@ -306,6 +306,10 @@ function end_load_history() {
 
 }
 
+function generic_gettile(template, coord, zoom) {
+        return template.replace('{x}', coord.x).replace('{y}', coord.y).replace('{z}', zoom)
+}
+
 // Initalizes the map and starts up our timers to call various functions
 function initialize_map() {
         // Load stored map settings if present
@@ -336,10 +340,13 @@ function initialize_map() {
 	for(var type in google.maps.MapTypeId) {
 		mapTypeIds.push(google.maps.MapTypeId[type]);
 	}
-	// Push OSM on to the end
-	mapTypeIds.push("OSM");
+
 	mapTypeIds.push("dark_map");
 
+        for (var type in ExtraMapTypes) {
+		mapTypeIds.push(type);
+        }
+
 	// Styled Map to outline airports and highways
 	var styles = [
 		{
@@ -423,19 +430,18 @@ function initialize_map() {
 	};
 
 	GoogleMap = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
-
-	//Define OSM map type pointing at the OpenStreetMap tile server
-	GoogleMap.mapTypes.set("OSM", new google.maps.ImageMapType({
-		getTileUrl: function(coord, zoom) {
-			return "http://tile.openstreetmap.org/" + zoom + "/" + coord.x + "/" + coord.y + ".png";
-		},
-		tileSize: new google.maps.Size(256, 256),
-		name: "OpenStreetMap",
-		maxZoom: 18
-	}));
-
 	GoogleMap.mapTypes.set("dark_map", styledMap);
 	
+        // Define the extra map types
+        for (var type in ExtraMapTypes) {
+	        GoogleMap.mapTypes.set(type, new google.maps.ImageMapType({
+		        getTileUrl: generic_gettile.bind(null, ExtraMapTypes[type]),
+		        tileSize: new google.maps.Size(256, 256),
+		        name: type,
+		        maxZoom: 18
+	        }));
+        }
+
 	// Listeners for newly created Map
         google.maps.event.addListener(GoogleMap, 'center_changed', function() {
                 localStorage['CenterLat'] = GoogleMap.getCenter().lat();