diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Aircraft/Instruments-3d/GPSmap196/gpsmap196.nas flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Aircraft/Instruments-3d/GPSmap196/gpsmap196.nas
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Aircraft/Instruments-3d/GPSmap196/gpsmap196.nas	2022-08-22 01:32:44.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Aircraft/Instruments-3d/GPSmap196/gpsmap196.nas	2023-12-17 01:00:12.000000000 +0000
@@ -92,7 +92,7 @@
     foreach(var type; [r('DME',0),r('APT'),  ] )
       me.pages.map.addLayer(factory: canvas.SymbolLayer, type_arg: type.name, visible: type.vis, priority: type.zindex,style:style);
 
-    canvas.parsesvg( var symbol=me.pages.map.createChild("group","airplane-symbol"), 'Nasal/canvas/map/boeingAirplane.svg');
+    canvas.parsesvg( var symbol=me.pages.map.createChild("group","airplane-symbol"), 'Nasal/canvas/map/Images/boeingAirplane.svg');
     symbol.setScale( 0.25 );
   },
 
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Materials/regions/materials.xml flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Materials/regions/materials.xml
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Materials/regions/materials.xml	2022-08-22 01:32:46.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Materials/regions/materials.xml	2023-12-17 01:00:12.000000000 +0000
@@ -75,6 +75,7 @@
 <region include="Materials/regions/southern_europe.xml"/>
 <region include="Materials/regions/corse.xml"/>
 <region include="Materials/regions/azores.xml"/>
+<region include="Materials/regions/svalbard.xml"/>
 
 <!-- Middle East-->
 <region include="Materials/regions/middle_east.xml"/>
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Materials/regions/svalbard.xml flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Materials/regions/svalbard.xml
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Materials/regions/svalbard.xml	1970-01-01 00:00:00.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Materials/regions/svalbard.xml	2023-12-17 01:00:12.000000000 +0000
@@ -0,0 +1,202 @@
+<?xml version="1.0"?>
+<!-- Regional definitions for Svalbard -->
+<!-- by Bea Wolf (D-ECHO), based on material files in FGData -->
+<PropertyList>
+	<name>Svalbard</name>
+	<area>
+		<lon1>10.0</lon1>
+		<lon2>37.0</lon2>
+		<lat1>74.0</lat1>
+		<lat2>81.0</lat2>
+	</area>
+	
+	<material>
+		<name>GrassCover</name>
+		<name>HerbTundraCover</name>
+		<name>HerbTundra</name>
+		<name>BareTundraCover</name>
+		<name>MixedTundraCover</name>
+		<effect>Effects/landmass-nowood</effect>
+		<texture-set>
+			<texture>Terrain/tundra2-autumn.png</texture>
+			<texture n="11">Terrain/grass_green_hires-autumn.png</texture>
+			<texture n="12">Terrain/rock_dark.png</texture>
+			<texture n="13">Terrain/rock_dark.png</texture>
+		</texture-set>
+		<parameters>
+			<grain_strength>0.8</grain_strength>
+			<transition_model>0.8</transition_model>
+			<hires_overlay_bias>-0.05</hires_overlay_bias>
+		</parameters>
+		<xsize>2000</xsize>
+		<ysize>2000</ysize>
+		<light-coverage>4000000.0</light-coverage>
+		<diffuse>
+			<r>0.93</r>
+			<g>0.95</g>
+			<b>0.93</b>
+			<a>1.0</a>
+		</diffuse>
+		<specular>
+			<r>0.1</r>
+			<g>0.12</g>
+			<b>0.1</b>
+			<a>1.0</a>
+		</specular>
+		<shininess>1.2</shininess>
+		<solid>1</solid>
+		<friction-factor>0.7</friction-factor>
+		<rolling-friction>0.1</rolling-friction>
+		<bumpiness>0.15</bumpiness>
+		<load-resistance>1e30</load-resistance>
+	</material>
+	
+	<material>
+		<name>DeciduousBroadCover</name>
+		<name>DeciduousForest</name>
+		<name>Marsh</name>
+		<name>Littoral</name>
+		<name>FloodLand</name>
+		<name>SaltMarsh</name>
+		<name>HerbWetlandCover</name>
+		<name>WoodedWetlandCover</name>
+		<name>Bog</name>
+		<name>Heath</name>
+		<texture-set>
+			<texture>Terrain/marsh4a-autumn.png</texture>
+			<texture n="12">Terrain/rock_dark.png</texture>
+			<texture n="11">Terrain/grass_green_hires-autumn.png</texture>
+			<texture n="13">Terrain/rock_dark.png</texture>
+			<texture n="15">Terrain/grass_hires.png</texture>
+		</texture-set>
+		<parameters>
+			<intrinsic_wetness>0.1</intrinsic_wetness>
+			<hires_overlay_bias>-0.07</hires_overlay_bias>
+			<grain_strength>0.9</grain_strength>
+			<transition_model>1.0</transition_model>
+		</parameters>
+		<xsize>2000</xsize>
+		<ysize>2000</ysize>
+		<solid>1</solid>
+		<light-coverage>40000000.0</light-coverage>
+		<friction-factor>0.8</friction-factor>
+		<rolling-friction>0.3</rolling-friction>
+		<bumpiness>0.2</bumpiness>
+		<load-resistance>1e30</load-resistance>
+	</material>
+	
+	<material>
+		<name>DryCropPastureCover</name>
+		<name>DryCrop</name>
+		<texture-set>
+			<texture>Terrain/iceland_grass-autumn.png</texture>
+			<texture n="11">Terrain/grass_green_hires-autumn.png</texture>
+			<texture n="12">Terrain/rock_dark.png</texture>
+			<texture n="13">Terrain/rock_dark.png</texture>
+		</texture-set>
+		<parameters>
+			<transition_model>0.8</transition_model>
+			<hires_overlay_bias>-0.1</hires_overlay_bias>
+		</parameters>
+		<xsize>2000</xsize>
+		<ysize>2000</ysize>
+		<solid>1</solid>
+		<friction-factor>0.9</friction-factor>
+		<rolling-friction>0.1</rolling-friction>
+		<bumpiness>0.6</bumpiness>
+		<load-resistance>1e30</load-resistance>
+		<light-coverage>2000000.0</light-coverage>
+	</material>
+	
+	<material>
+		<name>MixedCropPastureCover</name>
+		<name>MixedCrop</name>
+		<name>IrrCropPastureCover</name>
+		<name>IrrCrop</name>
+		<name>Orchard</name>
+		<name>Olives</name>
+		<name>Vineyard</name>
+		<name>Rice</name>
+		<texture-set>
+			<texture>Terrain/cropgrass-hires-autumn.png</texture>
+			<texture n="11">Terrain/grass_green_hires-autumn.png</texture>
+			<texture n="13">Terrain/rock_dark.png</texture>
+		</texture-set>
+		<object-mask>Terrain/cropgrass-hires.mask.png</object-mask>
+		<parameters>
+			<hires_overlay_bias>-0.1</hires_overlay_bias>
+		</parameters>
+		<xsize>2000</xsize>
+		<ysize>2000</ysize>
+		<light-coverage>2000000.0</light-coverage>
+		<solid>1</solid>
+		<friction-factor>0.9</friction-factor>
+		<rolling-friction>0.3</rolling-friction>
+		<bumpiness>0.6</bumpiness>
+		<load-resistance>1e30</load-resistance>
+		<object-group include="Materials/base/farm-buildings.xml"/>
+		<wood-coverage>5000.0</wood-coverage>
+		<tree-texture>Trees/mixed-alt.png</tree-texture>
+		<tree-varieties>8</tree-varieties>
+		<tree-height-m>20.0</tree-height-m>
+		<tree-width-m>12.0</tree-width-m>
+	</material>
+	
+	<material>
+		<name>Landmass</name>
+		<name>EvergreenBroadCover</name>
+		<name>EvergreenForest</name>
+		<name>MixedForestCover</name>
+		<name>MixedForest</name>
+		<name>SomeSort</name>
+		<name>Island</name>
+		<name>Default</name>
+		<name>ShrubCover</name>
+		<name>ShrubGrassCover</name>
+		<name>ScrubCover</name>
+		<name>Scrub</name>
+		<name>Sclerophyllous</name>
+		<effect>Effects/terrain-overlay</effect>
+		<texture-set>
+			<texture>Terrain/shrub1-autumn.png</texture>
+			<texture n="11">Terrain/grass_green_hires-autumn.png</texture>
+			<texture n="12">Terrain/rock_dark.png</texture>
+			<texture n="13">Terrain/rock_dark.png</texture>
+			<texture n="14">Terrain/grain_texture.png</texture>
+			<texture n="15">Terrain/rock_dark.png</texture>
+			<texture n="20">Terrain/rock_dark.png</texture>
+		</texture-set>
+		<parameters>
+			<dot_density>0.1</dot_density>
+			<transition_model>0.7</transition_model>
+			<hires_overlay_bias>-0.05</hires_overlay_bias>
+			<max_overlay_height>0.5</max_overlay_height>
+			<overlay_hardness>1.0</overlay_hardness>
+			<overlay_density>0.1</overlay_density>
+			<overlay_scale>2.0</overlay_scale>
+		</parameters>
+		<xsize>2000</xsize>
+		<ysize>2000</ysize>
+		<diffuse>
+			<r>0.86</r>
+			<g>0.86</g>
+			<b>0.86</b>
+			<a>1.0</a>
+		</diffuse>
+		<specular>
+			<r>0.1</r>
+			<g>0.1</g>
+			<b>0.1</b>
+			<a>1.0</a>
+		</specular>
+		<shininess>1.2</shininess>
+		<light-coverage>20000000.0</light-coverage>
+		<wood-coverage>12000.0</wood-coverage>
+		<tree-texture>Trees/mixed-shrub.png</tree-texture>
+		<tree-varieties>8</tree-varieties>
+		<tree-height-m>2.0</tree-height-m>
+		<tree-width-m>2.0</tree-width-m>
+		<rolling-friction>0.6</rolling-friction>
+		<bumpiness>0.4</bumpiness>
+	</material>
+</PropertyList>
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Nasal/canvas/map/VFRChart.lcontroller flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Nasal/canvas/map/VFRChart.lcontroller
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Nasal/canvas/map/VFRChart.lcontroller	2022-08-22 01:32:47.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Nasal/canvas/map/VFRChart.lcontroller	2023-12-17 01:00:12.000000000 +0000
@@ -34,7 +34,7 @@
 				min_lon : -179, max_lon: -60
 			},
 			{ name: 'DE',
-			 url : 'https://secais.dfs.de/static-maps/ICAO500-2015-EUR-Reprojected_07/tiles/{z}/{x}/{y}.png',
+			 url : 'https://secais.dfs.de/static-maps/icao500/tiles/{z}/{x}/{y}.png',
 			 path : layer.maps_base ~ '/secais/{z}/{x}/{y}.png',
 			 min_zoom : 5, max_zoom : 15,
 			 min_lat : 46, max_lat : 55.1,
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Nasal/towing/hitch.nas flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Nasal/towing/hitch.nas
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Nasal/towing/hitch.nas	2023-06-18 00:01:03.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Nasal/towing/hitch.nas	2023-12-17 01:00:12.000000000 +0000
@@ -2,7 +2,7 @@
 #			TOWING NASAL CODE
 #
 #		original version by D-NXKT up to version 30.12.2014
-#		updates by Benedikt Wolf and D-NXKT, version 01/2023
+#		updates by Bea Wolf and D-NXKT, version 12/2023
 #
 #
 # Purpose of this routine:
@@ -1315,8 +1315,20 @@
 			if ( winch_hash.clutched.getBoolValue() ) {
 				
 				if( winch_hash.type == 0 ){
-					# Concept: force is given
-					forcetow_N = force_setting;
+					# Concept: force is conrolled
+					
+					towlength_new_m = towlength_m - spoolspeed * delta_t;
+					delta_towlength_m = distance - towlength_new_m;
+					var delta_spoolspeed =  spool_acceleration * delta_t;
+					spoolspeed = spoolspeed + delta_spoolspeed ;
+					if ( spoolspeed > spool_max ) spoolspeed = spool_max;
+					
+					if ( delta_towlength_m < 0. ) {
+						forcetow_N = 0.;
+					}
+					else{
+						forcetow_N = elastic_constant * delta_towlength_m / towlength_new_m;
+					}
 					
 				} else if ( winch_hash.type == 1 ){
 					# Concept: regulate force to reach target speed
@@ -1328,13 +1340,12 @@
 							forcetow_N -= acceleration_N_s * delta_t;
 						}
 					}
+					# New towlength is distance from hook to winch; previous towlength is stored in winch_hash.towlength_m
+					towlength_new_m = distance;
+					delta_towlength_m = -1 * ( distance - towlength_m );
+					spoolspeed = delta_towlength_m / delta_t;
 				}
 				
-				# New towlength is distance from hook to winch; previous towlength is stored in winch_hash.towlength_m
-				towlength_new_m = distance;
-				delta_towlength_m = -1 * ( distance - towlength_m );
-				spoolspeed = delta_towlength_m / delta_t;	
-				
 			} else {   # un-clutched
 				# --- experimental --- #
 				towlength_new_m = towlength_m - spoolspeed * delta_t;
@@ -1355,12 +1366,14 @@
 				spoolspeed = spoolspeed - delta_spoolspeed;
 				if ( spoolspeed < - unspool_max ) spoolspeed = - unspool_max;
 				
-				
-				#if ( delta_towlength_m < 0. ) {
-				#	forcetow_N = 0.;
-				#}
+				if ( delta_towlength_m < 0. ) {
+					forcetow_N = 0.;
+				}
+				else{
+					forcetow_N = elastic_constant * delta_towlength_m / towlength_new_m;
+				}
 			}
-
+			
 			if ( forcetow_N > max_force_N ) {
 				forcetow_N = max_force_N;
 				var towlength_new_m = distance / ( forcetow_N / elastic_constant + 1. );
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/map/index-2.0.html flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/map/index-2.0.html
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/map/index-2.0.html	2022-08-22 01:32:47.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/map/index-2.0.html	2023-12-17 01:00:12.000000000 +0000
@@ -174,7 +174,7 @@
 
 
       "dfs.de VFR" : new L.TileLayer(
-        'https://secais.dfs.de/static-maps/ICAO500-2014-DACH-Reprojected_01/tiles/{z}/{x}/{y}.png', 
+        'https://secais.dfs.de/static-maps/icao500/tiles/{z}/{x}/{y}.png', 
         {
           minZoom : 5,
           maxZoom : 15,
@@ -183,7 +183,7 @@
         }),
 
       "Lower Airspace (Germany)" :  new L.TileLayer(
-        'https://secais.dfs.de/static-maps/lower_20131114/tiles/{z}/{x}/{y}.png', 
+        'https://secais.dfs.de/static-maps/lower/tiles/{z}/{x}/{y}.png', 
         {
           minZoom : 5,
           maxZoom : 15,
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/map/index-old.html flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/map/index-old.html
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/map/index-old.html	2022-08-22 01:32:47.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/map/index-old.html	2023-12-17 01:00:12.000000000 +0000
@@ -539,7 +539,7 @@
 
 
       "dfs.de VFR" : new L.TileLayer(
-        'https://secais.dfs.de/static-maps/ICAO500-2014-DACH-Reprojected_01/tiles/{z}/{x}/{y}.png', 
+        'https://secais.dfs.de/static-maps/icao500/tiles/{z}/{x}/{y}.png', 
         {
           minZoom : 5,
           maxZoom : 15,
@@ -548,7 +548,7 @@
         }),
 
       "Lower Airspace (Germany)" :  new L.TileLayer(
-        'https://secais.dfs.de/static-maps/lower_20131114/tiles/{z}/{x}/{y}.png', 
+        'https://secais.dfs.de/static-maps/lower/tiles/{z}/{x}/{y}.png', 
         {
           minZoom : 5,
           maxZoom : 15,
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/topics/Map.js flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/topics/Map.js
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/Phi/topics/Map.js	2022-08-22 01:32:47.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/Phi/topics/Map.js	2023-12-17 01:00:12.000000000 +0000
@@ -172,14 +172,14 @@
             }),
 
             "Germany VFR" : new L.TileLayer(
-                    'https://secais.dfs.de/static-maps/ICAO500-2015-EUR-Reprojected_07/tiles/{z}/{x}/{y}.png', {
+                    'https://secais.dfs.de/static-maps/icao500/tiles/{z}/{x}/{y}.png', {
                         minZoom : 5,
                         maxZoom : 15,
                         attribution : '&copy; <a target="_blank" href="http://www.dfs.de">DFS</a>',
                         bounds : L.latLngBounds(L.latLng(46.0, 5.0), L.latLng(55.1, 16.5)),
                     }),
 
-            "Germany Lower Airspace" : new L.TileLayer('https://secais.dfs.de/static-maps/lower_20131114/tiles/{z}/{x}/{y}.png',
+            "Germany Lower Airspace" : new L.TileLayer('https://secais.dfs.de/static-maps/lower/tiles/{z}/{x}/{y}.png',
                     {
                         minZoom : 5,
                         maxZoom : 15,
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/debian/changelog flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/debian/changelog
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/debian/changelog	2023-12-10 01:00:12.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/debian/changelog	2023-12-17 01:00:13.000000000 +0000
@@ -1,3 +1,15 @@
+flightgear-data (1:2020.4.0~10433+git57388cc3b+dfsg-0ubuntu1~ppa1) jammy; urgency=low
+
+  [ Gijs de Rooy ]
+  * Update German map tile URLs
+
+  [ Benedikt Wolf ]
+  * Nasal hitch.nas: Update by D-NXKT and Bea Wolf
+  * GPSMap196: Fix path error
+  * Materials: Improve Svalbard islands appearance
+
+ -- Saikrishna Arcot <saiarcot895@gmail.com>  Sat, 16 Dec 2023 17:00:13 -0800
+
 flightgear-data (1:2020.4.0~10429+git724fad670+dfsg-0ubuntu1~ppa1) jammy; urgency=low
 
   [ Henning ]
diff -Nru flightgear-data-2020.4.0~10429+git724fad670+dfsg/debian/get-orig-source flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/debian/get-orig-source
--- flightgear-data-2020.4.0~10429+git724fad670+dfsg/debian/get-orig-source	2020-05-25 00:07:16.000000000 +0000
+++ flightgear-data-2020.4.0~10433+git57388cc3b+dfsg/debian/get-orig-source	2023-12-10 20:51:54.000000000 +0000
@@ -26,5 +26,4 @@
 bunzip2 -c ../FlightGear-${VERSION}-data.tar.bz2 \
  | tar --delete --wildcards -vf - \
  fgdata/Fonts/LiberationFonts \
- fgdata/Timezone \
  | bzip2 -c > ../${PACKAGE}_${VERSION}+dfsg.orig.tar.bz2