diff --git a/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationService.cs b/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationService.cs
index 16eea6d7..36809ec3 100644
--- a/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationService.cs
+++ b/AsbCloudInfrastructure/Services/DetectOperations/DetectedOperationService.cs
@@ -11,6 +11,7 @@ using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 using AsbCloudInfrastructure.Services.DetectOperations.Detectors;
+using AsbCloudInfrastructure.Services.SAUB;
 
 namespace AsbCloudInfrastructure.Services.DetectOperations;
 
@@ -154,6 +155,8 @@ public class DetectedOperationService : IDetectedOperationService
 
             var detectableTelemetries = (await telemetryDataSaubService.GetByTelemetryAsync(idTelemetry, request, token))
                 .Where(t => t.BlockPosition >= 0)
+                .Select(t => t as TelemetryNewDataSaubDto)
+                .Where (t => t is not null)
                 .Select(t => new DetectableTelemetry
                 {
                     DateTime = t.DateTime,
@@ -191,7 +194,9 @@ public class DetectedOperationService : IDetectedOperationService
                 positionBegin += 1;
             }
 
-            beginDate = isDetected ? lastDetectedOperation!.DateEnd : detectableTelemetries[positionEnd].DateTime;
+            beginDate = isDetected 
+                ? lastDetectedOperation!.DateEnd
+                : detectableTelemetries[positionEnd].DateTime;
         }
 
         return detectedOperations;
diff --git a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataSaubService.cs b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataSaubService.cs
index 92db8e4d..e6fb372b 100644
--- a/AsbCloudInfrastructure/Services/SAUB/TelemetryDataSaubService.cs
+++ b/AsbCloudInfrastructure/Services/SAUB/TelemetryDataSaubService.cs
@@ -16,6 +16,11 @@ using System.Threading.Tasks;
 
 namespace AsbCloudInfrastructure.Services.SAUB;
 
+class TelemetryNewDataSaubDto : TelemetryDataSaubDto
+{
+    public new DateTimeOffset DateTime { get; set; }
+}
+
 public class TelemetryDataSaubService : TelemetryDataBaseService<TelemetryDataSaubDto, TelemetryDataSaub>, ITelemetryDataSaubService
 {
     private readonly ITelemetryUserService telemetryUserService;
@@ -124,10 +129,10 @@ public class TelemetryDataSaubService : TelemetryDataBaseService<TelemetryDataSa
 
     protected override TelemetryDataSaubDto Convert(TelemetryDataSaub src, double timezoneOffset)
     {
-        var dto = src.Adapt<TelemetryDataSaubDto>();
+        var dto = src.Adapt<TelemetryNewDataSaubDto>();
         var telemetryUser = telemetryUserService.GetOrDefault(src.IdTelemetry, src.IdUser ?? int.MinValue);
         dto.User = telemetryUser?.MakeDisplayName();
-        dto.DateTime = src.DateTime.ToRemoteDateTime(timezoneOffset);
+        dto.DateTime = src.DateTime.ToOffset(TimeSpan.FromHours(timezoneOffset)); // src.DateTime.ToRemoteDateTime(timezoneOffset);
         dto.BitDepth = src.BitDepth <= src.WellDepth
             ? src.BitDepth
             : src.WellDepth;