diff --git a/AIS/bsmd.AIS2Service/App.config b/AIS/bsmd.AIS2Service/App.config
index da7c04e3..5c6ab800 100644
--- a/AIS/bsmd.AIS2Service/App.config
+++ b/AIS/bsmd.AIS2Service/App.config
@@ -50,7 +50,7 @@
                 <value>60</value>
             </setting>
             <setting name="SQLiteDBConnectionString" serializeAs="String">
-                <value>Data Source=ais_initial.db;Version=3;</value>
+                <value>Data Source=ais_initial.db;Version=3;Synchronous=OFF;Journal Mode=MEMORY;</value>
             </setting>
             <setting name="PosReportDBCleanupDays" serializeAs="String">
                 <value>7</value>
diff --git a/AIS/bsmd.AIS2Service/Properties/Settings.Designer.cs b/AIS/bsmd.AIS2Service/Properties/Settings.Designer.cs
index a5128f39..445529ce 100644
--- a/AIS/bsmd.AIS2Service/Properties/Settings.Designer.cs
+++ b/AIS/bsmd.AIS2Service/Properties/Settings.Designer.cs
@@ -12,7 +12,7 @@ namespace bsmd.AIS2Service.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.4.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.2.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -70,7 +70,7 @@ namespace bsmd.AIS2Service.Properties {
         
         [global::System.Configuration.ApplicationScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("Data Source=ais_initial.db;Version=3;")]
+        [global::System.Configuration.DefaultSettingValueAttribute("Data Source=ais_initial.db;Version=3;Synchronous=OFF;Journal Mode=MEMORY;")]
         public string SQLiteDBConnectionString {
             get {
                 return ((string)(this["SQLiteDBConnectionString"]));
diff --git a/AIS/bsmd.AIS2Service/Properties/Settings.settings b/AIS/bsmd.AIS2Service/Properties/Settings.settings
index 3f43ac8f..6c152d26 100644
--- a/AIS/bsmd.AIS2Service/Properties/Settings.settings
+++ b/AIS/bsmd.AIS2Service/Properties/Settings.settings
@@ -18,7 +18,7 @@
       <Value Profile="(Default)">60</Value>
     </Setting>
     <Setting Name="SQLiteDBConnectionString" Type="System.String" Scope="Application">
-      <Value Profile="(Default)">Data Source=ais_initial.db;Version=3;</Value>
+      <Value Profile="(Default)">Data Source=ais_initial.db;Version=3;Synchronous=OFF;Journal Mode=MEMORY;</Value>
     </Setting>
     <Setting Name="PosReportDBCleanupDays" Type="System.Int32" Scope="Application">
       <Value Profile="(Default)">7</Value>
diff --git a/AIS/bsmd.AIS2Service/webservice/SLRController.cs b/AIS/bsmd.AIS2Service/webservice/SLRController.cs
index acb66a2e..8419a31c 100644
--- a/AIS/bsmd.AIS2Service/webservice/SLRController.cs
+++ b/AIS/bsmd.AIS2Service/webservice/SLRController.cs
@@ -15,13 +15,21 @@ namespace bsmd.AIS2Service
             if (!id.HasValue) return null;
             List<ShipLocationReport> result = AISManager.SQLiteStorage.GetShipLocationReports(id.Value);
 
+            // remove results not in SitRep
+            int obscureTargetCnt = result.RemoveAll(x => !AISManager.SitRep.ContainsKey(x.MMSI));
+            _log.InfoFormat("removed {0} obscure targets", obscureTargetCnt);
+
+            // remove targets w/o name (i.e. static data)
+            int unnamedPlayerCnt = result.RemoveAll(x => string.IsNullOrEmpty(AISManager.SitRep[x.MMSI].Name));
+            _log.InfoFormat("removed {0} unnamed targets", unnamedPlayerCnt);
+
             // Class B targets entfernen
-            int classBReportCnt = result.RemoveAll(x => AISManager.SitRep.ContainsKey(x.MMSI) && (AISManager.SitRep[x.MMSI].IsClassB ?? false));
-            _log.DebugFormat("removed {0} class B alarms from list"); // tut des?
+            int classBReportCnt = result.RemoveAll(x => AISManager.SitRep[x.MMSI].IsClassB ?? false);
+            _log.InfoFormat("removed {0} class B alarms from list", classBReportCnt); // tut des?
 
             // auch alles entfernen was "abgelaufen" ist und nicht im SitRep enthalten ist
-            int expiredCnt = result.RemoveAll(x => AISManager.SitRep.ContainsKey(x.MMSI) && ((DateTime.Now - x.Timestamp_Last).TotalMinutes > 1440));
-            _log.InfoFormat("removed {0} expired (> 1 day) alarms from list");
+            int expiredCnt = result.RemoveAll(x => (DateTime.Now - x.Timestamp_Last).TotalMinutes > 1440);
+            _log.InfoFormat("removed {0} expired (> 1 day) alarms from list", expiredCnt);
 
             Dictionary<int, List<ShipLocationReport>> mmsiDict = new Dictionary<int, List<ShipLocationReport>>();
             foreach(ShipLocationReport report in result) {
diff --git a/AIS/bsmd.AIS2Service/zonen.js b/AIS/bsmd.AIS2Service/zonen.js
index 9d3cb0b3..d08c6191 100644
--- a/AIS/bsmd.AIS2Service/zonen.js
+++ b/AIS/bsmd.AIS2Service/zonen.js
@@ -59,7 +59,7 @@ function updateData(data, groupId) {
 
             table.childNodes[1].appendChild(row); // append row to tbody subelement
         }
-
+        row.setAttribute("isActive", "true");
         const colCount = row.childNodes.length;
         row.childNodes[0].innerHTML = data[i].Name;
         if(data[i].VoyageDirection == 0) row.childNodes[1].innerHTML = '<img src="img/bullet_square_yellow.png" />';
@@ -82,7 +82,15 @@ function updateData(data, groupId) {
         row.childNodes[colCount - 1].innerHTML = data[i].Destination;
     }
 
-    // TODO: remove rows (after an interval) that are not in the result set any more
+    // array in-place removal taking place
+    var i = table.childNodes[1].rows.length;
+    while (i--) {
+        row = table.childNodes[1].rows[i];
+        if(row["isActive"] !== "true") { 
+            table.childNodes[1].rows.remove(row);
+        } 
+    }
+
 }
 
 function update() {
@@ -154,6 +162,8 @@ function createAreas()
             th6.innerHTML='Destination';
             tr.appendChild(th6);
 
+            tr.setAttribute("isActive", "true"); // set marker so it won't get deleted later
+
             aTable.appendChild(document.createElement('tbody'));
             aDiv.appendChild(aTable);
             aDiv.appendChild(document.createElement('hr'));