diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsByYearService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsByYearService.cs
index 81bb2a0..5756c11 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsByYearService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsByYearService.cs
@@ -23,6 +23,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves statistics grouped by year.
+        /// </summary>
+        /// <returns>A collection of StatsByYear entities containing the statistics.</returns>
         public IEnumerable<StatsByYear> GetStats()
         {
             var allStats = _statsByYearRepository.GetAll(_identityService.ConnectedUser);
@@ -50,6 +54,9 @@ namespace skydiveLogs_api.DomainBusiness
             return allStats;
         }
 
+        /// <summary>
+        /// Resets the year statistics.
+        /// </summary>
         public void Reset()
         {
             _statsByYearRepository.Delete(_identityService.ConnectedUser);
@@ -65,4 +72,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByDzService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByDzService.cs
index 5cbfdca..025074d 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByDzService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByDzService.cs
@@ -23,6 +23,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves statistics for the last month grouped by drop zone.
+        /// </summary>
+        /// <returns>A collection of StatsForLastMonthByDz entities containing the statistics.</returns>
         public IEnumerable<StatsForLastMonthByDz> GetStats()
         {
             var allStats = _statsForLastMonthByDzRepository.GetAll(_identityService.ConnectedUser);
@@ -55,6 +59,9 @@ namespace skydiveLogs_api.DomainBusiness
             return allStats;
         }
 
+        /// <summary>
+        /// Resets the last month drop zone statistics.
+        /// </summary>
         public void Reset()
         {
             _statsForLastMonthByDzRepository.Delete(_identityService.ConnectedUser);
@@ -70,4 +77,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByJumpTypeService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByJumpTypeService.cs
index 9f89577..cb2b6d9 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByJumpTypeService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsForLastMonthByJumpTypeService.cs
@@ -23,6 +23,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves statistics for the last month grouped by jump type.
+        /// </summary>
+        /// <returns>A collection of StatsForLastMonthByJumpType entities containing the statistics.</returns>
         public IEnumerable<StatsForLastMonthByJumpType> GetStats()
         {
             var allStats = _statsForLastMonthByJumpTypeRepository.GetAll(_identityService.ConnectedUser);
@@ -55,6 +59,9 @@ namespace skydiveLogs_api.DomainBusiness
             return allStats;
         }
 
+        /// <summary>
+        /// Resets the last month jump type statistics.
+        /// </summary>
         public void Reset()
         {
             _statsForLastMonthByJumpTypeRepository.Delete(_identityService.ConnectedUser);
@@ -70,4 +77,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByDzService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByDzService.cs
index 6b44295..97e0aef 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByDzService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByDzService.cs
@@ -23,6 +23,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves statistics for the last year grouped by drop zone.
+        /// </summary>
+        /// <returns>A collection of StatsForLastYearByDz entities containing the statistics.</returns>
         public IEnumerable<StatsForLastYearByDz> GetStats()
         {
             var allStats = _statsForLastYearByDzRepository.GetAll(_identityService.ConnectedUser);
@@ -54,6 +58,9 @@ namespace skydiveLogs_api.DomainBusiness
             return allStats;
         }
 
+        /// <summary>
+        /// Resets the last year drop zone statistics.
+        /// </summary>
         public void Reset()
         {
             _statsForLastYearByDzRepository.Delete(_identityService.ConnectedUser);
@@ -69,4 +76,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByJumpTypeService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByJumpTypeService.cs
index 7f0569c..703e423 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByJumpTypeService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsForLastYearByJumpTypeService.cs
@@ -23,6 +23,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves statistics for the last year grouped by jump type.
+        /// </summary>
+        /// <returns>A collection of StatsForLastYearByJumpType entities containing the statistics.</returns>
         public IEnumerable<StatsForLastYearByJumpType> GetStats()
         {
             var allStats = _statsForLastYearByJumpTypeRepository.GetAll(_identityService.ConnectedUser);
@@ -54,7 +58,9 @@ namespace skydiveLogs_api.DomainBusiness
             return allStats;
         }
 
-
+        /// <summary>
+        /// Resets the last year jump type statistics.
+        /// </summary>
         public void Reset()
         {
             _statsForLastYearByJumpTypeRepository.Delete(_identityService.ConnectedUser);
@@ -71,4 +77,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/StatsService.cs b/Back/skydiveLogs-api.DomainBusiness/StatsService.cs
index e6eb3e2..085cd1a 100644
--- a/Back/skydiveLogs-api.DomainBusiness/StatsService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/StatsService.cs
@@ -38,6 +38,10 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves a simple summary of all statistics.
+        /// </summary>
+        /// <returns>A SimpleSummary entity containing the simple summary statistics.</returns>
         public SimpleSummary GetSimpleSummary()
         {
             var allJumps = _jumpService.GetAllJumps();
@@ -58,6 +62,9 @@ namespace skydiveLogs_api.DomainBusiness
             return results;
         }
 
+        /// <summary>
+        /// Resets all statistics.
+        /// </summary>
         public void Reset()
         {
             _statsByAircraftService.Reset();
@@ -72,6 +79,10 @@ namespace skydiveLogs_api.DomainBusiness
             _statsForLastYearByJumpTypeService.Reset();
         }
 
+        /// <summary>
+        /// Retrieves statistics grouped by aircraft.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing aircraft statistics.</returns>
         public IEnumerable<Statistic> GetStatsByAircraft()
         {
             var tmp = _statsByAircraftService.GetStats();
@@ -82,6 +93,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics grouped by drop zone.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing drop zone statistics.</returns>
         public IEnumerable<Statistic> GetStatsByDz()
         {
             var tmp = _statsByDzService.GetStats();
@@ -92,6 +107,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics grouped by gear.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing gear statistics.</returns>
         public IEnumerable<Statistic> GetStatsByGear()
         {
             var tmp = _statsByGearService.GetStats();
@@ -102,6 +121,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics grouped by jump type.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing jump type statistics.</returns>
         public IEnumerable<Statistic> GetStatsByJumpType()
         {
             var tmp = _statsByJumpTypeService.GetStats();
@@ -112,6 +135,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics grouped by year.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing year statistics.</returns>
         public IEnumerable<Statistic> GetStatsByYear()
         {
             var tmp = _statsByYearService.GetStats();
@@ -122,6 +149,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics for the last month grouped by drop zone.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing last month drop zone statistics.</returns>
         public IEnumerable<Statistic> GetStatsForLastMonthByDz()
         {
             var tmp = _statsForLastMonthByDzService.GetStats();
@@ -132,6 +163,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics for the last month grouped by jump type.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing last month jump type statistics.</returns>
         public IEnumerable<Statistic> GetStatsForLastMonthByJumpType()
         {
             var tmp = _statsForLastMonthByJumpTypeService.GetStats();
@@ -142,6 +177,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics for the last year grouped by drop zone.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing last year drop zone statistics.</returns>
         public IEnumerable<Statistic> GetStatsForLastYearByDz()
         {
             var tmp = _statsForLastYearByDzService.GetStats();
@@ -152,6 +191,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics for the last year grouped by jump type.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing last year jump type statistics.</returns>
         public IEnumerable<Statistic> GetStatsForLastYearByJumpType()
         {
             var tmp = _statsForLastYearByJumpTypeService.GetStats();
@@ -162,6 +205,10 @@ namespace skydiveLogs_api.DomainBusiness
             })];
         }
 
+        /// <summary>
+        /// Retrieves statistics by year grouped with jump type.
+        /// </summary>
+        /// <returns>A collection of Statistic entities containing yearly jump type statistics.</returns>
         public IEnumerable<Statistic> GetStatsByYearByJumpType()
         {
             var tmp = _statsByYearByJumpTypeService.GetStats();
@@ -191,4 +238,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs b/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
index ff769da..c9a3537 100644
--- a/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
@@ -11,7 +11,7 @@ namespace skydiveLogs_api.DomainBusiness
     {
         #region Public Constructors
 
-        public TunnelFlightService(IJumpTypeService jumpTypeService, 
+        public TunnelFlightService(IJumpTypeService jumpTypeService,
                                    ITunnelFlightRepository tunnelFlightRepository,
                                    IDropZoneService dropZoneService,
                                    IIdentityService identityService)
@@ -26,26 +26,51 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Retrieves all tunnel flights.
+        /// </summary>
+        /// <returns>A collection of TunnelFlight entities containing all tunnel flights.</returns>
         public IEnumerable<TunnelFlight> GetAllTunnelFlights()
         {
             return _tunnelFlightRepository.GetAll(_identityService.ConnectedUser);
         }
 
+        /// <summary>
+        /// Retrieves a tunnel flight by its ID.
+        /// </summary>
+        /// <param name="id">The tunnel flight ID to retrieve.</param>
+        /// <returns>A TunnelFlight entity containing the tunnel flight details.</returns>
         public TunnelFlight GetTunnelFlightById(int id)
         {
             return _tunnelFlightRepository.GetById(id);
         }
 
+        /// <summary>
+        /// Retrieves the total count of tunnel flights.
+        /// </summary>
+        /// <returns>The total number of tunnel flights.</returns>
         public int GetTunnelFlightCount()
         {
             return _tunnelFlightRepository.GetCount(_identityService.ConnectedUser);
         }
 
+        /// <summary>
+        /// Retrieves a range of tunnel flights with pagination.
+        /// </summary>
+        /// <param name="beginIndex">The starting index for pagination.</param>
+        /// <param name="endIndex">The ending index for pagination.</param>
+        /// <returns>A collection of TunnelFlight entities containing the requested range.</returns>
         public IEnumerable<TunnelFlight> GetTunnelFlightsByIndexes(int beginIndex, int endIndex)
         {
             return _tunnelFlightRepository.GetBetweenIndex(_identityService.ConnectedUser, beginIndex, endIndex);
         }
 
+        /// <summary>
+        /// Retrieves tunnel flights grouped by month within a date range.
+        /// </summary>
+        /// <param name="beginDate">The start date for grouping.</param>
+        /// <param name="endDate">The end date for grouping.</param>
+        /// <returns>A collection of Statistic entities grouped by month.</returns>
         public IEnumerable<Statistic> GetTunnelFlightGroupByMonth(string beginDate, string endDate)
         {
             var convertedBeginDate = Convert.ToDateTime(beginDate);
@@ -69,6 +94,12 @@ namespace skydiveLogs_api.DomainBusiness
 
             return results;
         }
+        /// <summary>
+        /// Retrieves tunnel flights filtered by date range.
+        /// </summary>
+        /// <param name="beginDate">The start date for filtering.</param>
+        /// <param name="endDate">The end date for filtering.</param>
+        /// <returns>A collection of TunnelFlight entities filtered by the specified date range.</returns>
         public IEnumerable<TunnelFlight> GetTunnelFlightByDates(string beginDate, string endDate)
         {
             var convertedBeginDate = Convert.ToDateTime(beginDate);
@@ -76,7 +107,13 @@ namespace skydiveLogs_api.DomainBusiness
 
             return _tunnelFlightRepository.GetBetweenDate(_identityService.ConnectedUser, convertedBeginDate, convertedEndDate);
         }
-                               
+
+        /// <summary>
+        /// Adds a new tunnel flight to the system.
+        /// </summary>
+        /// <param name="tunnelId">The tunnel ID to add the flight to.</param>
+        /// <param name="jumpTypeId">The jump type ID for the flight.</param>
+        /// <param name="newFlight">TunnelFlight entity containing the new flight data.</param>
         public void AddNewFlight(int tunnelId, int jumpTypeId, TunnelFlight newFlight)
         {
             var tmp = _dropZoneService.GetDzById(tunnelId);
@@ -93,17 +130,25 @@ namespace skydiveLogs_api.DomainBusiness
 
             var selectedJumpType = _jumpTypeService.GetJumpTypeById(jumpTypeId);
 
-
             newFlight.Tunnel = selectedTunnel;
             newFlight.JumpType = selectedJumpType;
             _tunnelFlightRepository.Add(newFlight);
         }
 
+        /// <summary>
+        /// Deletes a tunnel flight by its ID.
+        /// </summary>
+        /// <param name="id">The tunnel flight ID to delete.</param>
         public void DeleteTunnelFlightById(int id)
         {
             _tunnelFlightRepository.DeleteById(id);
         }
 
+        /// <summary>
+        /// Updates an existing tunnel flight.
+        /// </summary>
+        /// <param name="id">The tunnel flight ID to update.</param>
+        /// <param name="updatedTunnelFlight">TunnelFlight entity containing the updated tunnel flight data.</param>
         public void UpdateTunnelFlight(int id, TunnelFlight updatedTunnelFlight)
         {
             var myTunnelFlight = GetTunnelFlightById(id);
@@ -125,4 +170,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}
diff --git a/Back/skydiveLogs-api.DomainBusiness/UserImageService.cs b/Back/skydiveLogs-api.DomainBusiness/UserImageService.cs
index dce1997..94a2276 100644
--- a/Back/skydiveLogs-api.DomainBusiness/UserImageService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/UserImageService.cs
@@ -21,27 +21,49 @@ namespace skydiveLogs_api.DomainBusiness
 
         #region Public Methods
 
+        /// <summary>
+        /// Adds a new image to the system.
+        /// </summary>
+        /// <param name="newImage">The UserImage entity containing the new image data.</param>
         public void AddNewImage(UserImage newImage)
         {
             newImage.User = _identityService.ConnectedUser;
             _imageRepository.Add(newImage);
         }
 
+        /// <summary>
+        /// Deletes an image by its ID.
+        /// </summary>
+        /// <param name="id">The image ID to delete.</param>
         public void DeleteImageById(int id)
         {
             throw new NotImplementedException();
         }
 
+        /// <summary>
+        /// Retrieves all images.
+        /// </summary>
+        /// <returns>A collection of UserImage entities containing all images.</returns>
         public IEnumerable<UserImage> GetAllImages()
         {
             return _imageRepository.GetAll(_identityService.ConnectedUser);
         }
 
+        /// <summary>
+        /// Retrieves an image by its ID.
+        /// </summary>
+        /// <param name="id">The image ID to retrieve.</param>
+        /// <returns>A UserImage entity containing the image details.</returns>
         public UserImage GetImageById(int id)
         {
             return _imageRepository.GetById(id);
         }
 
+        /// <summary>
+        /// Updates an existing image.
+        /// </summary>
+        /// <param name="id">The image ID to update.</param>
+        /// <param name="Image">UserImage entity containing the updated image data.</param>
         public void UpdateImage(int id, UserImage Image)
         {
             throw new NotImplementedException();
@@ -56,4 +78,4 @@ namespace skydiveLogs_api.DomainBusiness
 
         #endregion Private Fields
     }
-}
\ No newline at end of file
+}