diff --git a/_water/navionics.SonarChart.layer.zmp/GetUrlScript.txt b/_water/navionics.SonarChart.layer.zmp/GetUrlScript.txt
index fbec165c..2e229080 100644
--- a/_water/navionics.SonarChart.layer.zmp/GetUrlScript.txt
+++ b/_water/navionics.SonarChart.layer.zmp/GetUrlScript.txt
@@ -1,44 +1,77 @@
+//******************************************************************************
 // LAYERS parameter: config_a_b_c
 //    a = 1 for depth in meters, 2 for depth in feet, 3 for fathoms
 //    b = 10.00: for 10.00 m safety depth (beginning of blue coloring) (unit equal to that set by a)
 //    c = 0 for pristine Navionics charts, 1 for Sonar Charts
-// TRANSPARENT parameter: FALSE for non-layer, TRUE for layer
-// UGC parameter: FALSE for pristine Navionics charts, TRUE for additinal user-generated content icons
+//
+// TRANSPARENT parameter: 
+//    FALSE for non-layer
+//    TRUE for layer
+//
+// UGC parameter: 
+//    FALSE for pristine Navionics charts
+//    TRUE for additinal user-generated content icons
+//******************************************************************************
+
+const
+  cReqParams = 'LAYERS=config_1_10.00_1&TRANSPARENT=TRUE&UGC=FALSE';
+
+//******************************************************************************
+
+const
+  cTTL = 24*60*60; // 24 hour  
+  cNavTokenKey = 'NavToken=';
+  cTimeStampKey = 'TimeStamp=';
+  
+function CheckTTL(const ATimeStamp: AnsiString): Boolean;
+begin
+  Result := ( (cTTL div 2) > GetUnixTime - StrToInt64Def(ATimeStamp, 0) );   
+end;
 
 function GetNavToken: AnsiString;
 var
-  VTimeStamp: AnsiString;  
+  VNavToken: AnsiString;
+  VTimeStamp: AnsiString;    
   VResponseCode: Cardinal;
   VResponseHeader, VResponseData: AnsiString;
-  VRequestUrl, VRequestHeader, VPostData: AnsiString;
+  VRequestUrl: AnsiString;
 begin
-  Result := 'ERROR_1';
+  Result := '';
   
   if ScriptBuffer <> '' then begin
-    Result := ScriptBuffer;
-    Exit;
+    VNavToken := GetBetween(ScriptBuffer, cNavTokenKey, ';');
+    VTimeStamp := GetBetween(ScriptBuffer, cTimeStampKey, ';');
+    if (VNavToken <> '') and (VTimeStamp <> '') and CheckTTL(VTimeStamp) then begin
+      Result := VNavToken;      
+    end else begin
+      ScriptBuffer := '';
+    end;
   end;
   
-  if Assigned(Downloader) then begin
-    VTimeStamp := IntToStr(GetUnixTime);
+  if (Result = '') and Assigned(Downloader) then begin    
+    VTimeStamp := IntToStr(GetUnixTime);    
     VRequestUrl := 'https://backend.navionics.io/tile/get_key/Navionics_internalpurpose_00001/webapiv2.navionics.com?_=' + VTimeStamp;
-    VRequestHeader := '';
-    VPostData := '';
     VResponseHeader := '';
-    VResponseData := '';
- 
-    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, VRequestHeader, VPostData, VResponseHeader, VResponseData);
+    VResponseData := ''; 
+    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, '', '', VResponseHeader, VResponseData);
  
     if VResponseCode = 200 then begin
-      ScriptBuffer := VResponseData;
-      Result := ScriptBuffer;
-    end else begin
-      ScriptBuffer := 'ERROR_2';
+      Result := VResponseData;
+      ScriptBuffer := cNavTokenKey + Result + ';' + cTimeStampKey + VTimeStamp + ';';
     end; 
   end;
-
 end;
 
-begin 
-  ResultURL:=GetURLBase+inttostr(GetZ-1)+'/'+inttostr(GetX)+'/'+inttostr(GetY)+'?LAYERS=config_1_10.00_1&TRANSPARENT=TRUE&UGC=FALSE&navtoken='+GetNavToken;
+//******************************************************************************
+
+var
+  VNavToken: AnsiString;
+begin
+  VNavToken := GetNavToken;
+  if VNavToken <> '' then begin
+    ResultURL := GetURLBase + IntToStr(GetZ-1) + '/' + IntToStr(GetX) + '/' + 
+      IntToStr(GetY) + '?' + cReqParams + '&' + 'navtoken=' + VNavToken;
+  end else begin
+    ResultURL := '';
+  end;
 end.
diff --git a/_water/navionics.SonarChart.zmp/GetUrlScript.txt b/_water/navionics.SonarChart.zmp/GetUrlScript.txt
index f18360db..74900090 100644
--- a/_water/navionics.SonarChart.zmp/GetUrlScript.txt
+++ b/_water/navionics.SonarChart.zmp/GetUrlScript.txt
@@ -1,44 +1,77 @@
+//******************************************************************************
 // LAYERS parameter: config_a_b_c
 //    a = 1 for depth in meters, 2 for depth in feet, 3 for fathoms
 //    b = 10.00: for 10.00 m safety depth (beginning of blue coloring) (unit equal to that set by a)
 //    c = 0 for pristine Navionics charts, 1 for Sonar Charts
-// TRANSPARENT parameter: FALSE for non-layer, TRUE for layer
-// UGC parameter: FALSE for pristine Navionics charts, TRUE for additinal user-generated content icons
+//
+// TRANSPARENT parameter: 
+//    FALSE for non-layer
+//    TRUE for layer
+//
+// UGC parameter: 
+//    FALSE for pristine Navionics charts
+//    TRUE for additinal user-generated content icons
+//******************************************************************************
+
+const
+  cReqParams = 'LAYERS=config_1_10.00_1&TRANSPARENT=FALSE&UGC=FALSE';
+
+//******************************************************************************
+
+const
+  cTTL = 24*60*60; // 24 hour  
+  cNavTokenKey = 'NavToken=';
+  cTimeStampKey = 'TimeStamp=';
+  
+function CheckTTL(const ATimeStamp: AnsiString): Boolean;
+begin
+  Result := ( (cTTL div 2) > GetUnixTime - StrToInt64Def(ATimeStamp, 0) );   
+end;
 
 function GetNavToken: AnsiString;
 var
-  VTimeStamp: AnsiString;  
+  VNavToken: AnsiString;
+  VTimeStamp: AnsiString;    
   VResponseCode: Cardinal;
   VResponseHeader, VResponseData: AnsiString;
-  VRequestUrl, VRequestHeader, VPostData: AnsiString;
+  VRequestUrl: AnsiString;
 begin
-  Result := 'ERROR_1';
+  Result := '';
   
   if ScriptBuffer <> '' then begin
-    Result := ScriptBuffer;
-    Exit;
+    VNavToken := GetBetween(ScriptBuffer, cNavTokenKey, ';');
+    VTimeStamp := GetBetween(ScriptBuffer, cTimeStampKey, ';');
+    if (VNavToken <> '') and (VTimeStamp <> '') and CheckTTL(VTimeStamp) then begin
+      Result := VNavToken;      
+    end else begin
+      ScriptBuffer := '';
+    end;
   end;
   
-  if Assigned(Downloader) then begin
-    VTimeStamp := IntToStr(GetUnixTime);
+  if (Result = '') and Assigned(Downloader) then begin    
+    VTimeStamp := IntToStr(GetUnixTime);    
     VRequestUrl := 'https://backend.navionics.io/tile/get_key/Navionics_internalpurpose_00001/webapiv2.navionics.com?_=' + VTimeStamp;
-    VRequestHeader := '';
-    VPostData := '';
     VResponseHeader := '';
-    VResponseData := '';
- 
-    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, VRequestHeader, VPostData, VResponseHeader, VResponseData);
+    VResponseData := ''; 
+    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, '', '', VResponseHeader, VResponseData);
  
     if VResponseCode = 200 then begin
-      ScriptBuffer := VResponseData;
-      Result := ScriptBuffer;
-    end else begin
-      ScriptBuffer := 'ERROR_2';
+      Result := VResponseData;
+      ScriptBuffer := cNavTokenKey + Result + ';' + cTimeStampKey + VTimeStamp + ';';
     end; 
   end;
-
 end;
 
-begin 
-  ResultURL:=GetURLBase+inttostr(GetZ-1)+'/'+inttostr(GetX)+'/'+inttostr(GetY)+'?LAYERS=config_1_10.00_1&TRANSPARENT=FALSE&UGC=FALSE&navtoken='+GetNavToken;
+//******************************************************************************
+
+var
+  VNavToken: AnsiString;
+begin
+  VNavToken := GetNavToken;
+  if VNavToken <> '' then begin
+    ResultURL := GetURLBase + IntToStr(GetZ-1) + '/' + IntToStr(GetX) + '/' + 
+      IntToStr(GetY) + '?' + cReqParams + '&' + 'navtoken=' + VNavToken;
+  end else begin
+    ResultURL := '';
+  end;
 end.
diff --git a/_water/navionics.layer.zmp/GetUrlScript.txt b/_water/navionics.layer.zmp/GetUrlScript.txt
index e14b27f1..721ac01b 100644
--- a/_water/navionics.layer.zmp/GetUrlScript.txt
+++ b/_water/navionics.layer.zmp/GetUrlScript.txt
@@ -1,44 +1,77 @@
+//******************************************************************************
 // LAYERS parameter: config_a_b_c
 //    a = 1 for depth in meters, 2 for depth in feet, 3 for fathoms
 //    b = 10.00: for 10.00 m safety depth (beginning of blue coloring) (unit equal to that set by a)
 //    c = 0 for pristine Navionics charts, 1 for Sonar Charts
-// TRANSPARENT parameter: FALSE for non-layer, TRUE for layer
-// UGC parameter: FALSE for pristine Navionics charts, TRUE for additinal user-generated content icons
+//
+// TRANSPARENT parameter: 
+//    FALSE for non-layer
+//    TRUE for layer
+//
+// UGC parameter: 
+//    FALSE for pristine Navionics charts
+//    TRUE for additinal user-generated content icons
+//******************************************************************************
+
+const
+  cReqParams = 'LAYERS=config_1_10.00_0&TRANSPARENT=TRUE&UGC=FALSE';
+
+//******************************************************************************
+
+const
+  cTTL = 24*60*60; // 24 hour  
+  cNavTokenKey = 'NavToken=';
+  cTimeStampKey = 'TimeStamp=';
+  
+function CheckTTL(const ATimeStamp: AnsiString): Boolean;
+begin
+  Result := ( (cTTL div 2) > GetUnixTime - StrToInt64Def(ATimeStamp, 0) );   
+end;
 
 function GetNavToken: AnsiString;
 var
-  VTimeStamp: AnsiString;  
+  VNavToken: AnsiString;
+  VTimeStamp: AnsiString;    
   VResponseCode: Cardinal;
   VResponseHeader, VResponseData: AnsiString;
-  VRequestUrl, VRequestHeader, VPostData: AnsiString;
+  VRequestUrl: AnsiString;
 begin
-  Result := 'ERROR_1';
+  Result := '';
   
   if ScriptBuffer <> '' then begin
-    Result := ScriptBuffer;
-    Exit;
+    VNavToken := GetBetween(ScriptBuffer, cNavTokenKey, ';');
+    VTimeStamp := GetBetween(ScriptBuffer, cTimeStampKey, ';');
+    if (VNavToken <> '') and (VTimeStamp <> '') and CheckTTL(VTimeStamp) then begin
+      Result := VNavToken;      
+    end else begin
+      ScriptBuffer := '';
+    end;
   end;
   
-  if Assigned(Downloader) then begin
-    VTimeStamp := IntToStr(GetUnixTime);
+  if (Result = '') and Assigned(Downloader) then begin    
+    VTimeStamp := IntToStr(GetUnixTime);    
     VRequestUrl := 'https://backend.navionics.io/tile/get_key/Navionics_internalpurpose_00001/webapiv2.navionics.com?_=' + VTimeStamp;
-    VRequestHeader := '';
-    VPostData := '';
     VResponseHeader := '';
-    VResponseData := '';
- 
-    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, VRequestHeader, VPostData, VResponseHeader, VResponseData);
+    VResponseData := ''; 
+    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, '', '', VResponseHeader, VResponseData);
  
     if VResponseCode = 200 then begin
-      ScriptBuffer := VResponseData;
-      Result := ScriptBuffer;
-    end else begin
-      ScriptBuffer := 'ERROR_2';
+      Result := VResponseData;
+      ScriptBuffer := cNavTokenKey + Result + ';' + cTimeStampKey + VTimeStamp + ';';
     end; 
   end;
-
 end;
 
-begin 
-  ResultURL:=GetURLBase+inttostr(GetZ-1)+'/'+inttostr(GetX)+'/'+inttostr(GetY)+'?LAYERS=config_1_10.00_0&TRANSPARENT=TRUE&UGC=FALSE&navtoken='+GetNavToken;
+//******************************************************************************
+
+var
+  VNavToken: AnsiString;
+begin
+  VNavToken := GetNavToken;
+  if VNavToken <> '' then begin
+    ResultURL := GetURLBase + IntToStr(GetZ-1) + '/' + IntToStr(GetX) + '/' + 
+      IntToStr(GetY) + '?' + cReqParams + '&' + 'navtoken=' + VNavToken;
+  end else begin
+    ResultURL := '';
+  end;
 end.
diff --git a/_water/navionics.zmp/GetUrlScript.txt b/_water/navionics.zmp/GetUrlScript.txt
index 1a83a4ef..906ff623 100644
--- a/_water/navionics.zmp/GetUrlScript.txt
+++ b/_water/navionics.zmp/GetUrlScript.txt
@@ -1,44 +1,77 @@
+//******************************************************************************
 // LAYERS parameter: config_a_b_c
 //    a = 1 for depth in meters, 2 for depth in feet, 3 for fathoms
 //    b = 10.00: for 10.00 m safety depth (beginning of blue coloring) (unit equal to that set by a)
 //    c = 0 for pristine Navionics charts, 1 for Sonar Charts
-// TRANSPARENT parameter: FALSE for non-layer, TRUE for layer
-// UGC parameter: FALSE for pristine Navionics charts, TRUE for additinal user-generated content icons
+//
+// TRANSPARENT parameter: 
+//    FALSE for non-layer
+//    TRUE for layer
+//
+// UGC parameter: 
+//    FALSE for pristine Navionics charts
+//    TRUE for additinal user-generated content icons
+//******************************************************************************
+
+const
+  cReqParams = 'LAYERS=config_1_10.00_0&TRANSPARENT=FALSE&UGC=FALSE';
+
+//******************************************************************************
+
+const
+  cTTL = 24*60*60; // 24 hour  
+  cNavTokenKey = 'NavToken=';
+  cTimeStampKey = 'TimeStamp=';
+  
+function CheckTTL(const ATimeStamp: AnsiString): Boolean;
+begin
+  Result := ( (cTTL div 2) > GetUnixTime - StrToInt64Def(ATimeStamp, 0) );   
+end;
 
 function GetNavToken: AnsiString;
 var
-  VTimeStamp: AnsiString;  
+  VNavToken: AnsiString;
+  VTimeStamp: AnsiString;    
   VResponseCode: Cardinal;
   VResponseHeader, VResponseData: AnsiString;
-  VRequestUrl, VRequestHeader, VPostData: AnsiString;
+  VRequestUrl: AnsiString;
 begin
-  Result := 'ERROR_1';
+  Result := '';
   
   if ScriptBuffer <> '' then begin
-    Result := ScriptBuffer;
-    Exit;
+    VNavToken := GetBetween(ScriptBuffer, cNavTokenKey, ';');
+    VTimeStamp := GetBetween(ScriptBuffer, cTimeStampKey, ';');
+    if (VNavToken <> '') and (VTimeStamp <> '') and CheckTTL(VTimeStamp) then begin
+      Result := VNavToken;      
+    end else begin
+      ScriptBuffer := '';
+    end;
   end;
   
-  if Assigned(Downloader) then begin
-    VTimeStamp := IntToStr(GetUnixTime);
+  if (Result = '') and Assigned(Downloader) then begin    
+    VTimeStamp := IntToStr(GetUnixTime);    
     VRequestUrl := 'https://backend.navionics.io/tile/get_key/Navionics_internalpurpose_00001/webapiv2.navionics.com?_=' + VTimeStamp;
-    VRequestHeader := '';
-    VPostData := '';
     VResponseHeader := '';
-    VResponseData := '';
- 
-    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, VRequestHeader, VPostData, VResponseHeader, VResponseData);
+    VResponseData := ''; 
+    VResponseCode := Downloader.DoHttpRequest(VRequestUrl, '', '', VResponseHeader, VResponseData);
  
     if VResponseCode = 200 then begin
-      ScriptBuffer := VResponseData;
-      Result := ScriptBuffer;
-    end else begin
-      ScriptBuffer := 'ERROR_2';
+      Result := VResponseData;
+      ScriptBuffer := cNavTokenKey + Result + ';' + cTimeStampKey + VTimeStamp + ';';
     end; 
   end;
-
 end;
 
-begin   
-  ResultURL:=GetURLBase + IntToStr(GetZ-1) + '/' + IntToStr(GetX) + '/' + IntToStr(GetY) + '?LAYERS=config_1_10.00_0&TRANSPARENT=FALSE&UGC=FALSE&navtoken=' + GetNavToken;
+//******************************************************************************
+
+var
+  VNavToken: AnsiString;
+begin
+  VNavToken := GetNavToken;
+  if VNavToken <> '' then begin
+    ResultURL := GetURLBase + IntToStr(GetZ-1) + '/' + IntToStr(GetX) + '/' + 
+      IntToStr(GetY) + '?' + cReqParams + '&' + 'navtoken=' + VNavToken;
+  end else begin
+    ResultURL := '';
+  end;
 end.