diff --git a/misc/update_1.5_to_1.6.sql b/misc/update_1.5_to_1.6.sql
index 74b93e9..842df4b 100644
--- a/misc/update_1.5_to_1.6.sql
+++ b/misc/update_1.5_to_1.6.sql
@@ -13,7 +13,7 @@ INSERT INTO port (id, name, locode) VALUES (1, 'Bremen', 'DEBRE');
 
 -- Adding new ref column to berth
 ALTER TABLE `bremen_calling_devel`.`berth` 
-ADD COLUMN `port_id` INT UNSIGNED NOT NULL DEFAULT 1 AFTER `authority_id`;
+ADD COLUMN `port_id` INT UNSIGNED DEFAULT NULL AFTER `authority_id`;
 ALTER TABLE `bremen_calling_devel`.`berth` ALTER INDEX `FK_AUTHORITY_PART_idx` INVISIBLE;
 
 -- adding a foreign key berth.port_id -> port.id
@@ -52,3 +52,6 @@ CREATE TABLE `participant_port_map` (
   CONSTRAINT `FK_PP_PARTICIPANT` FOREIGN KEY (`participant_id`) REFERENCES `participant` (`id`),
   CONSTRAINT `FK_PP_PORT` FOREIGN KEY (`port_id`) REFERENCES `port` (`id`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci COMMENT='Mapping table that assigns participants to a port';
+
+-- all existing berths shall default to "bremen"
+UPDATE berth SET port_id = 1;
\ No newline at end of file
diff --git a/src/RoleEditor/EditBerthDialog.xaml b/src/RoleEditor/EditBerthDialog.xaml
index 234b02b..2fbb4e3 100644
--- a/src/RoleEditor/EditBerthDialog.xaml
+++ b/src/RoleEditor/EditBerthDialog.xaml
@@ -5,7 +5,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:RoleEditor"
         mc:Ignorable="d"
-        Title="Edit berth" Height="188" Width="450" Loaded="Window_Loaded">
+        Title="Edit berth" Height="216" Width="450" Loaded="Window_Loaded">
     <Grid x:Name="berthGrid">
         <Grid.ColumnDefinitions>
             <ColumnDefinition Width=".3*" />
@@ -16,6 +16,7 @@
             <RowDefinition Height="28" />
             <RowDefinition Height="28" />
             <RowDefinition Height="28" />
+            <RowDefinition Height="28" />
             <RowDefinition Height="*" />
             <RowDefinition Height="28" />
         </Grid.RowDefinitions>
@@ -45,7 +46,9 @@
         </Grid>
         <Label Content="Uses lock" HorizontalAlignment="Right" Grid.Row="3" />
         <CheckBox x:Name="checkBoxLock" Grid.Row="3" Grid.Column="1" VerticalAlignment="Center" Margin="2" IsChecked="{Binding Path=Lock, Mode=OneWay}"/>
-        <StackPanel Grid.Column="1" Grid.Row="5" Orientation="Horizontal" FlowDirection="RightToLeft">
+        <Label Content="Port" HorizontalAlignment="Right" Grid.Row="4" />
+        <ComboBox Name="comboBoxPorts" Margin="2" Grid.Column="1" Grid.Row="4" SelectedItem="{Binding Port, Mode=OneWay}" />
+        <StackPanel Grid.Column="1" Grid.Row="6" Orientation="Horizontal" FlowDirection="RightToLeft">
             <Button x:Name="buttonCancel" Width="80" Content="Cancel" Margin="2" Click="buttonCancel_Click" />
             <Button x:Name="buttonOK" Width="80" Content="OK" Margin="2" Click="buttonOK_Click"/>
         </StackPanel>
diff --git a/src/RoleEditor/EditBerthDialog.xaml.cs b/src/RoleEditor/EditBerthDialog.xaml.cs
index 9f1a0a3..3f1b649 100644
--- a/src/RoleEditor/EditBerthDialog.xaml.cs
+++ b/src/RoleEditor/EditBerthDialog.xaml.cs
@@ -20,6 +20,8 @@ namespace RoleEditor
 
         public List<Participant> Authorities { get; } = new List<Participant>();
 
+        public List<Port> Ports { get; } = new List<Port>();
+
         private void buttonCancel_Click(object sender, RoutedEventArgs e)
         {
             this.DialogResult = false;
@@ -52,6 +54,7 @@ namespace RoleEditor
             this.DataContext = this.Berth;
             this.comboBoxParticipants.ItemsSource = this.Owners;
             this.comboBoxAuthorities.ItemsSource = this.Authorities;
+            this.comboBoxPorts.ItemsSource = this.Ports;
         }
 
         private void buttonResetParticipant_Click(object sender, RoutedEventArgs e)
diff --git a/src/RoleEditor/MainWindow.xaml b/src/RoleEditor/MainWindow.xaml
index 8cf5eed..5dde421 100644
--- a/src/RoleEditor/MainWindow.xaml
+++ b/src/RoleEditor/MainWindow.xaml
@@ -340,6 +340,7 @@
                             <DataGridCheckBoxColumn Header="Lock" Binding="{Binding Path=Lock}" IsReadOnly="True"/>
                             <DataGridTextColumn Header="Terminal" Binding="{Binding Path=Terminal, Mode=OneWay}" IsReadOnly="True"/>
                             <DataGridTextColumn Header="Authority" Binding="{Binding Path=Authority_Text, Mode=OneWay}" IsReadOnly="True" />
+                            <DataGridTextColumn Header="Port" Binding="{Binding Path=Port}" IsReadOnly="True" />
                             <DataGridTextColumn Header="Deleted" Binding="{Binding Path=Deleted, Mode=OneWay}" IsReadOnly="True" />
                         </DataGrid.Columns>
                     </local:ENIDataGrid>
diff --git a/src/RoleEditor/MainWindow.xaml.cs b/src/RoleEditor/MainWindow.xaml.cs
index a4252ba..dc04e09 100644
--- a/src/RoleEditor/MainWindow.xaml.cs
+++ b/src/RoleEditor/MainWindow.xaml.cs
@@ -79,6 +79,10 @@ namespace RoleEditor
                     _securables.Add(s);
                 this.listBoxSecurables.ItemsSource = _securables;
 
+                // load all ports
+                foreach (Port port in await Port.LoadAll(_dbManager)) _ports.Add(port);
+                this.listBoxPort.ItemsSource = _ports;
+
                 // load all berths                
                 foreach (Berth b in await Berth.LoadAll(_dbManager))
                 {
@@ -91,6 +95,10 @@ namespace RoleEditor
                     {
                         b.Authority = participants.Where(p => p.Id == b.Authority_Id).FirstOrDefault();
                     }
+                    if (b.Port_Id != null)
+                    {
+                        b.Port = _ports.Where(p => p.Id == b.Port_Id).FirstOrDefault();
+                    }
                 }
                 this.dataGridBerths.Initialize();
                 this.dataGridBerths.ItemsSource = _berths;
@@ -114,11 +122,7 @@ namespace RoleEditor
 
                 this.dataGridShips.CreateRequested += DataGridShips_CreateRequested;
                 this.dataGridShips.EditRequested += DataGridShips_EditRequested;
-                this.dataGridShips.DeleteRequested += DataGridShips_DeleteRequested;
-
-                // load all ports
-                foreach(Port port in await Port.LoadAll(_dbManager)) _ports.Add(port);
-                this.listBoxPort.ItemsSource = _ports;                
+                this.dataGridShips.DeleteRequested += DataGridShips_DeleteRequested;                
 
 
                 // set other item sources (filled later after selection)
@@ -200,6 +204,7 @@ namespace RoleEditor
                 ebd.Berth = b;
                 ebd.Owners.AddRange(this._terminals);
                 ebd.Authorities.AddRange(this._authorities);
+                ebd.Ports.AddRange(this._ports.Where(p => !p.IsDeleted));
                 if (ebd.ShowDialog() ?? false)
                 {
                     await b.Save(_dbManager);
@@ -216,6 +221,7 @@ namespace RoleEditor
             ebd.Berth = b;
             ebd.Owners.AddRange(this._terminals);
             ebd.Authorities.AddRange(this._authorities);
+            ebd.Ports.AddRange(_ports.Where(p => !p.IsDeleted));
             if (ebd.ShowDialog() ?? false)
             {
                 _berths.Add(b);
@@ -738,7 +744,7 @@ namespace RoleEditor
                             {
                                 if (reader.FieldCount < 2)
                                 {
-                                    throw new InvalidDataException("Sheet must have at least 2 Columns of data");
+                                    throw new InvalidDataException("Sheet must have at least 3 Columns of data");
                                 }
                                 
                                 if (reader.IsDBNull(0) && reader.IsDBNull(1)) continue;
@@ -753,8 +759,20 @@ namespace RoleEditor
                                 if (_berths.Any(predicate: x => (x.Name != null) && x.Name.Equals(berth_name, StringComparison.OrdinalIgnoreCase)))
                                     continue;
 
+                                string port_name = "";
+                                if (!reader.IsDBNull(2)) port_name = reader.GetString(2);
+                                
+                                // find port in list
+                                if(!_ports.Any(x => (x.Name != null) && x.Name.Equals(port_name, StringComparison.OrdinalIgnoreCase)))
+                                    continue;
+
+                                Port port = _ports.First(x => (x.Name != null) && x.Name.Equals(port_name, StringComparison.OrdinalIgnoreCase));
+
                                 Berth b = new Berth();
                                 b.Name = berth_name;
+                                b.Port = port;
+                                b.Port_Id = port.Id;
+
                                 bool found_participant = false;
 
                                 foreach(Participant p in this._participants)
diff --git a/src/brecal.model/Berth.cs b/src/brecal.model/Berth.cs
index a9d4f08..34a091d 100644
--- a/src/brecal.model/Berth.cs
+++ b/src/brecal.model/Berth.cs
@@ -1,12 +1,7 @@
 // Copyright (c) 2023- schick Informatik
 // Description: Model class for berth entity
 
-using System;
-using System.Collections.Generic;
 using System.Data;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace brecal.model
 {
@@ -23,10 +18,14 @@ namespace brecal.model
 
         public uint? Authority_Id { get; set; }
 
+        public uint? Port_Id { get; set; }
+
         public Participant? Owner { get; set; }
 
         public Participant? Authority { get; set; }
 
+        public Port? Port { get; set; }
+
         public string? Terminal { get { if (Owner != null) return Owner.Name; else return "n/a";  } }
 
         public string? Authority_Text { get { if (Authority != null) return Authority.Name; else return "n/a"; } }
@@ -48,12 +47,12 @@ namespace brecal.model
 
         public static void SetLoadQuery(IDbCommand cmd, params object?[] list)
         {
-            cmd.CommandText = "SELECT id, name, owner_id, authority_id, `lock`, created, modified, deleted FROM berth";
+            cmd.CommandText = "SELECT id, name, owner_id, authority_id, port_id, `lock`, created, modified, deleted FROM berth";
         }
 
         public static List<DbEntity> LoadElems(IDataReader reader)
         {
-            List<DbEntity> result = new List<DbEntity>();
+            List<DbEntity> result = new();
             while (reader.Read())
             {
                 Berth b = new();
@@ -61,10 +60,11 @@ namespace brecal.model
                 if (!reader.IsDBNull(1)) b.Name = reader.GetString(1);
                 if (!reader.IsDBNull(2)) b.Owner_Id = (uint) reader.GetInt32(2);
                 if (!reader.IsDBNull(3)) b.Authority_Id = (uint) reader.GetInt32(3);
-                if (!reader.IsDBNull(4)) b.Lock = reader.GetBoolean(4);
-                if (!reader.IsDBNull(5)) b.Created = reader.GetDateTime(5);
-                if (!reader.IsDBNull(6)) b.Modified = reader.GetDateTime(6);
-                if (!reader.IsDBNull(7)) b.Deleted = reader.GetInt16(7);
+                if (!reader.IsDBNull(4)) b.Port_Id = (uint) reader.GetInt32(4);
+                if (!reader.IsDBNull(5)) b.Lock = reader.GetBoolean(5);
+                if (!reader.IsDBNull(6)) b.Created = reader.GetDateTime(6);
+                if (!reader.IsDBNull(7)) b.Modified = reader.GetDateTime(7);
+                if (!reader.IsDBNull(8)) b.Deleted = reader.GetInt16(8);
                 result.Add(b);
             }
             return result;
@@ -76,7 +76,7 @@ namespace brecal.model
 
         public override void SetCreate(IDbCommand cmd)
         {
-            cmd.CommandText = "INSERT INTO berth (owner_id, authority_id, name, `lock`) VALUES ( @PID, @AID, @NAME, @LOCK)";
+            cmd.CommandText = "INSERT INTO berth (owner_id, authority_id, port_id, name, `lock`) VALUES ( @PID, @AID, @PO_ID, @NAME, @LOCK)";
             this.SetParameters(cmd);
         }
 
@@ -92,7 +92,7 @@ namespace brecal.model
 
         public override void SetUpdate(IDbCommand cmd)
         {            
-            cmd.CommandText = "UPDATE berth SET name = @NAME, owner_id = @PID, authority_id = @AID, `lock` = @LOCK WHERE id = @ID";            
+            cmd.CommandText = "UPDATE berth SET name = @NAME, owner_id = @PID, authority_id = @AID, port_id = @PO_ID, `lock` = @LOCK WHERE id = @ID";
             this.SetParameters(cmd);
         }
 
@@ -109,14 +109,19 @@ namespace brecal.model
 
             IDbDataParameter pid = cmd.CreateParameter();
             pid.ParameterName = "PID";
-            pid.Value = this.Owner_Id;
+            pid.Value = this.Owner_Id.HasValue ? this.Owner_Id.Value : DBNull.Value;
             cmd.Parameters.Add(pid);
 
             IDbDataParameter aid = cmd.CreateParameter();
             aid.ParameterName = "AID";
-            aid.Value = this.Authority_Id;
+            aid.Value = this.Authority_Id.HasValue ? this.Authority_Id.Value : DBNull.Value;
             cmd.Parameters.Add(aid);
 
+            IDbDataParameter poid = cmd.CreateParameter();
+            poid.ParameterName = "PO_ID";
+            poid.Value = this.Port_Id.HasValue ? this.Port_Id.Value : DBNull.Value;
+            cmd.Parameters.Add(poid);
+
             IDbDataParameter name = cmd.CreateParameter();
             name.ParameterName = "NAME";
             name.Value = this.Name;
diff --git a/src/brecal.model/Port.cs b/src/brecal.model/Port.cs
index 0346281..aef5b9a 100644
--- a/src/brecal.model/Port.cs
+++ b/src/brecal.model/Port.cs
@@ -14,7 +14,7 @@ namespace brecal.model
 
         public string? Locode { get; set; }
 
-        public bool ? IsDeleted { get; set; }
+        public bool IsDeleted { get; set; } = false;
 
         #endregion