diff --git a/View/sediment_calibration_tab.py b/View/sediment_calibration_tab.py
index dafabc5..93175eb 100644
--- a/View/sediment_calibration_tab.py
+++ b/View/sediment_calibration_tab.py
@@ -67,7 +67,9 @@ class SedimentCalibrationTab(QWidget):
         self._setup_widgets()
 
     def _path_icon(self, icon):
-        return os.path.join("icons", icon)
+        return os.path.join(
+            os.path.dirname(__file__), "..", "icons", icon
+        )
 
     def _setup_icons(self):
         self.icon_folder = QIcon(self._path_icon("folder.png"))
@@ -2065,88 +2067,86 @@ class SedimentCalibrationTab(QWidget):
 
         stg.alpha_s = [alpha_s_freq1, alpha_s_freq2]
 
-        logger.debug(f"\u03B1s for frequency of freq1 : {alpha_s_freq1:.2f} /m \n")
-        logger.debug(f"\u03B1s for frequency of freq2 : {alpha_s_freq2:.2f} /m")
+        logger.debug(
+            f"\u03B1s for frequency of freq1 : {alpha_s_freq1:.2f} / m"
+        )
+        logger.debug(
+            f"\u03B1s for frequency of freq2 : {alpha_s_freq2:.2f} / m"
+        )
 
         self.lineEdit_alphas_freq1.clear()
-        self.lineEdit_alphas_freq1.setText(str("%.5f" % alpha_s_freq1))
+        self.lineEdit_alphas_freq1.setText(f"{alpha_s_freq1:.5f}")
 
         self.lineEdit_alphas_freq2.clear()
-        self.lineEdit_alphas_freq2.setText(str("%.5f" % alpha_s_freq2))
+        self.lineEdit_alphas_freq2.setText(f"{alpha_s_freq2:.5f}")
+
+        title = "Alpha computation error"
+        icon = self._path_icon("no_approved.png")
 
         if (alpha_s_freq1 < 0) or (alpha_s_freq2 < 0):
-
-            msgBox = QMessageBox()
-            msgBox.setWindowTitle("Alpha computation error")
-            msgBox.setIconPixmap(QPixmap(self._path_icon("no_approved.png")).scaledToHeight(32, Qt.SmoothTransformation))
-            msgBox.setText("Sediment sound attenuation is negative !")
-            msgBox.setStandardButtons(QMessageBox.Ok)
-            msgBox.exec()
-
+            text = "Sediment sound attenuation is negative !"
         elif isinf(alpha_s_freq1) or isinf(alpha_s_freq2):
-
-            msgBox = QMessageBox()
-            msgBox.setWindowTitle("Alpha computation error")
-            msgBox.setIconPixmap(
-                QPixmap(self._path_icon("no_approved.png")).scaledToHeight(32, Qt.SmoothTransformation))
-            msgBox.setText("Sediment sound attenuation is infinite !")
-            msgBox.setStandardButtons(QMessageBox.Ok)
-            msgBox.exec()
-
+            text = "Sediment sound attenuation is infinite !"
         else:
+            title = "Alpha computation validation"
+            icon = self._path_icon("approved.png")
+            text = "Sediment sound attenuation is positive."
 
-            msgBox = QMessageBox()
-            msgBox.setWindowTitle("Alpha computation validation")
-            msgBox.setIconPixmap(QPixmap(self._path_icon("approved.png")).scaledToHeight(32, Qt.SmoothTransformation))
-            msgBox.setText("Sediment sound attenuation is positive.")
-            msgBox.setStandardButtons(QMessageBox.Ok)
-            msgBox.exec()
+        msgBox = QMessageBox()
+        msgBox.setWindowTitle(title)
+        msgBox.setIconPixmap(
+            QPixmap(icon).scaledToHeight(
+                32, Qt.SmoothTransformation
+            )
+        )
+        msgBox.setText(text)
+        msgBox.setStandardButtons(QMessageBox.Ok)
+        msgBox.exec()
 
     def compute_zeta(self):
-
-        # --- Compute zeta ---
         if stg.M_profile_fine.shape == (0,):
-
             msgBox = QMessageBox()
             msgBox.setWindowTitle("Zeta computation error")
             msgBox.setIcon(QMessageBox.Warning)
             msgBox.setText("Please interpolate fine profile")
             msgBox.setStandardButtons(QMessageBox.Ok)
             msgBox.exec()
+            return
 
+        data_id = self.combobox_acoustic_data_choice.currentIndex()
+        freq_1 = self.combobox_freq1.currentIndex()
+        freq_2 = self.combobox_freq2.currentIndex()
+
+        if stg.depth_cross_section[data_id].shape != (0,):
+            depth_data = stg.depth_cross_section
         else:
+            depth_data = stg.depth
 
-            if stg.depth_cross_section[self.combobox_acoustic_data_choice.currentIndex()].shape != (0,):
+        zeta_freq1 = self.inv_hc.zeta(
+            alpha_s = stg.alpha_s[0],
+            r = depth_data[data_id][freq_1, :],
+            M_profile_fine = stg.M_profile_fine
+        )
+        zeta_freq2 = self.inv_hc.zeta(
+            alpha_s = stg.alpha_s[1],
+            r = depth_data[data_id][freq_2, :],
+            M_profile_fine = stg.M_profile_fine
+        )
 
-                zeta_freq1 = self.inv_hc.zeta(alpha_s=stg.alpha_s[0],
-                                              r=stg.depth_cross_section[self.combobox_acoustic_data_choice.currentIndex()][
-                                                self.combobox_freq1.currentIndex(), :],
-                                              M_profile_fine=stg.M_profile_fine)
-                zeta_freq2 = self.inv_hc.zeta(alpha_s=stg.alpha_s[1],
-                                              r=stg.depth_cross_section[self.combobox_acoustic_data_choice.currentIndex()][
-                                                self.combobox_freq2.currentIndex(), :],
-                                              M_profile_fine=stg.M_profile_fine)
+        stg.zeta = [zeta_freq1, zeta_freq2]
 
-            else:
-                zeta_freq1 = self.inv_hc.zeta(alpha_s=stg.alpha_s[0],
-                                              r=stg.depth[self.combobox_acoustic_data_choice.currentIndex()][
-                                                self.combobox_freq1.currentIndex(), :],
-                                              M_profile_fine=stg.M_profile_fine)
-                zeta_freq2 = self.inv_hc.zeta(alpha_s=stg.alpha_s[1],
-                                              r=stg.depth[self.combobox_acoustic_data_choice.currentIndex()][
-                                                self.combobox_freq2.currentIndex(), :],
-                                              M_profile_fine=stg.M_profile_fine)
+        logger.debug(
+            f"\u03B6 for frequency of freq1 : {zeta_freq1:.3f} / m"
+        )
+        logger.debug(
+            f"\u03B6 for frequency of freq2 : {zeta_freq2:.3f} / m"
+        )
 
-            stg.zeta = [zeta_freq1, zeta_freq2]
+        self.lineEdit_zeta_freq1.clear()
+        self.lineEdit_zeta_freq1.setText(f"{zeta_freq1:.5f}")
 
-            logger.debug(f"\u03B6 for frequency of freq1 : {zeta_freq1:.3f} /m \n")
-            logger.debug(f"\u03B6 for frequency of freq2 : {zeta_freq2:.3f} /m")
-
-            self.lineEdit_zeta_freq1.clear()
-            self.lineEdit_zeta_freq1.setText(str("%.5f" % zeta_freq1))
-
-            self.lineEdit_zeta_freq2.clear()
-            self.lineEdit_zeta_freq2.setText(str("%.5f" % zeta_freq2))
+        self.lineEdit_zeta_freq2.clear()
+        self.lineEdit_zeta_freq2.setText(f"{zeta_freq2:.5f}")
 
     def save_calibration(self):
         data_id = self.combobox_acoustic_data_choice.currentIndex()