diff --git a/View/signal_processing_tab.py b/View/signal_processing_tab.py
index 931fd15..7fe84fc 100644
--- a/View/signal_processing_tab.py
+++ b/View/signal_processing_tab.py
@@ -75,6 +75,7 @@ class SignalProcessingTab(QWidget):
 
 
         self._setup_icons()
+        self._setup_attrs()
 
         ### --- General layout of widgets ---
 
@@ -511,6 +512,13 @@ class SignalProcessingTab(QWidget):
         self.icon_clear = QIcon(path_icon("clear.png"))
         self.icon_apply = QIcon(path_icon("circle_green_arrow_right.png"))
 
+    def _setup_attrs(self):
+        self.fig_profile_tail = None
+        self.fig_noise = None
+        self.fig_SNR = None
+        self.fig_BS = None
+        self.figure_profile = None
+
     def full_update(self):
         logger.debug(f"{__name__}: Update")
         self.blockSignals(True)
@@ -782,46 +790,63 @@ class SignalProcessingTab(QWidget):
             msgBox.exec()
 
         else:
+            data_id = self.combobox_acoustic_data_choice.currentIndex()
+            freq_noise_id = self.combobox_freq_noise_from_profile_tail.currentIndex()
 
-            if stg.BS_mean[self.combobox_acoustic_data_choice.currentIndex()].shape != (0,):
+            if stg.BS_mean[data_id].shape == (0,):
+                return
 
-                self.verticalLayout_groupbox_plot_profile_tail.removeWidget(self.canvas_profile_tail)
+            self.verticalLayout_groupbox_plot_profile_tail.removeWidget(self.canvas_profile_tail)
 
-                self.fig_profile_tail, self.axis_profile_tail = plt.subplots(nrows=1, ncols=1, layout='constrained')
-                self.canvas_profile_tail = FigureCanvas(self.fig_profile_tail)
+            if self.fig_profile_tail is not None:
+                self.fig_profile_tail.clear()
 
-                self.verticalLayout_groupbox_plot_profile_tail.addWidget(self.canvas_profile_tail)
+            self.fig_profile_tail, self.axis_profile_tail = \
+                plt.subplots(nrows=1, ncols=1, layout='constrained')
+            self.canvas_profile_tail = FigureCanvas(self.fig_profile_tail)
 
-                self.axis_profile_tail.plot(
-                        -stg.depth[self.combobox_acoustic_data_choice.currentIndex()][self.combobox_freq_noise_from_profile_tail.currentIndex()],
-                        stg.BS_mean[self.combobox_acoustic_data_choice.currentIndex()][self.combobox_freq_noise_from_profile_tail.currentIndex()],
-                        color="blue", linewidth=1)
-                self.axis_profile_tail.plot(
-                        -stg.depth[self.combobox_acoustic_data_choice.currentIndex()][
-                            self.combobox_freq_noise_from_profile_tail.currentIndex()],
-                        float(self.lineEdit_profile_tail_value.text().replace(",", ".")) *
-                            np.ones(stg.depth[self.combobox_acoustic_data_choice.currentIndex()][
-                                self.combobox_freq_noise_from_profile_tail.currentIndex()].shape[0]),
-                        linestyle='dashed', linewidth=2, color='red')
+            self.verticalLayout_groupbox_plot_profile_tail.addWidget(self.canvas_profile_tail)
 
-                self.axis_profile_tail.set_yscale('log')
-                self.axis_profile_tail.tick_params(axis='both', labelsize=8)
-                self.axis_profile_tail.text(.98, .03, "Depth (m)",
-                                            fontsize=8, fontweight='bold', fontname="DejaVu Sans", c="black", alpha=0.9,
-                                            horizontalalignment='right', verticalalignment='bottom', rotation='horizontal',
-                                            transform=self.axis_profile_tail.transAxes)
-                self.axis_profile_tail.text(.1, .45, "BS signal (v)",
-                                            fontsize=8, fontweight='bold', fontname="DejaVu Sans", c="black", alpha=0.9,
-                                            horizontalalignment='right', verticalalignment='bottom', rotation='vertical',
-                                            transform=self.axis_profile_tail.transAxes)
-                self.axis_profile_tail.text(.98, .85,
-                                            stg.freq_text[self.combobox_acoustic_data_choice.currentIndex()][
-                                                self.combobox_freq_noise_from_profile_tail.currentIndex()],
-                                            fontsize=10, fontweight='bold', fontname="DejaVu Sans", c="black", alpha=0.5,
-                                            horizontalalignment='right', verticalalignment='bottom',
-                                            transform=self.axis_profile_tail.transAxes)
+            self.axis_profile_tail.plot(
+                -stg.depth[data_id][freq_noise_id],
+                stg.BS_mean[data_id][freq_noise_id],
+                color="blue", linewidth=1
+            )
+            self.axis_profile_tail.plot(
+                -stg.depth[data_id][freq_noise_id],
+                float(self.lineEdit_profile_tail_value.text().replace(",", "."))
+                * np.ones(stg.depth[data_id][freq_noise_id].shape[0]),
+                linestyle='dashed', linewidth=2, color='red'
+            )
 
-                self.fig_profile_tail.canvas.draw_idle()
+            self.axis_profile_tail.set_yscale('log')
+            self.axis_profile_tail.tick_params(axis='both', labelsize=8)
+            self.axis_profile_tail.text(
+                .98, .03, "Depth (m)",
+                fontsize=8, fontweight='bold',
+                fontname="DejaVu Sans", c="black", alpha=0.9,
+                horizontalalignment='right',
+                verticalalignment='bottom', rotation='horizontal',
+                transform=self.axis_profile_tail.transAxes
+            )
+            self.axis_profile_tail.text(
+                .1, .45, "BS signal (v)",
+                fontsize=8, fontweight='bold',
+                fontname="DejaVu Sans", c="black", alpha=0.9,
+                horizontalalignment='right',
+                verticalalignment='bottom', rotation='vertical',
+                transform=self.axis_profile_tail.transAxes
+            )
+            self.axis_profile_tail.text(
+                .98, .85,
+                stg.freq_text[data_id][freq_noise_id],
+                fontsize=10, fontweight='bold',
+                fontname="DejaVu Sans", c="black", alpha=0.5,
+                horizontalalignment='right', verticalalignment='bottom',
+                transform=self.axis_profile_tail.transAxes
+            )
+
+            self.fig_profile_tail.canvas.draw_idle()
 
     # ------------------------------------------------------
 
@@ -1141,7 +1166,12 @@ class SignalProcessingTab(QWidget):
     def plot_noise(self):
         self.horizontalLayout_groupbox_plot_noise_data.removeWidget(self.canvas_noise)
 
-        self.fig_noise, self.axis_noise = plt.subplots(nrows=1, ncols=1, layout="constrained")
+        if self.fig_noise is not None:
+            self.fig_noise.clear()
+
+        self.fig_noise, self.axis_noise = plt.subplots(
+            nrows=1, ncols=1, layout="constrained"
+        )
         self.canvas_noise = FigureCanvas(self.fig_noise)
 
         self.horizontalLayout_groupbox_plot_noise_data.addWidget(self.canvas_noise)
@@ -1189,6 +1219,9 @@ class SignalProcessingTab(QWidget):
                 self.verticalLayout_groupbox_plot_SNR.removeWidget(self.toolbar_SNR)
                 self.verticalLayout_groupbox_plot_SNR.removeWidget(self.scroll_SNR)
 
+                if self.fig_SNR is not None:
+                    self.fig_SNR.clear()
+
                 self.fig_SNR, self.axis_SNR = plt.subplots(
                     nrows=stg.freq[data_id].shape[0], ncols=1,
                     sharex=True, sharey=False, layout='constrained'
@@ -1369,6 +1402,9 @@ class SignalProcessingTab(QWidget):
             self.verticalLayout_groupbox_plot_pre_processed_data_2D_field\
                 .removeWidget(self.scroll_BS)
 
+            if self.fig_BS is not None:
+                self.fig_BS.clear()
+
             self.fig_BS, self.axis_BS = plt.subplots(
                 nrows=stg.freq[data_id].shape[0], ncols=1,
                 sharex=True, sharey=False, layout="constrained"
@@ -1600,7 +1636,12 @@ class SignalProcessingTab(QWidget):
             self.verticalLayout_groupbox_plot_profile.removeWidget(self.toolbar_profile)
             self.verticalLayout_groupbox_plot_profile.removeWidget(self.canvas_profile)
 
-            self.figure_profile, self.axis_profile = plt.subplots(nrows=1, ncols=1, layout="constrained")
+            if self.figure_profile is not None:
+                self.figure_profile.clear()
+
+            self.figure_profile, self.axis_profile = plt.subplots(
+                nrows=1, ncols=1, layout="constrained"
+            )
             self.canvas_profile = FigureCanvas(self.figure_profile)
             self.toolbar_profile = NavigationToolBar(self.canvas_profile, self)