private void starboard_aft_checkboxActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_starboard_aft_checkboxActionPerformed
        //
        if (starboard_middle_checkbox.isSelected()==true && starboard_aft_checkbox.isSelected()==true)
        {
            //
            starboard_forward_checkbox.setEnabled(false);
        }
        //
        else if(starboard_forward_checkbox.isSelected()==true && starboard_aft_checkbox.isSelected()==true)
        {
            //
            starboard_middle_checkbox.setEnabled(false);
        }
        //
        else if(starboard_middle_checkbox.isSelected()==true && starboard_aft_checkbox.isSelected()==false)
        {
            //
            starboard_forward_checkbox.setEnabled(true);
        }
        //
        else if(starboard_forward_checkbox.isSelected()==true && starboard_aft_checkbox.isSelected()==false)
        {
            //
            starboard_middle_checkbox.setEnabled(true);
        }
        //
        else
        {
            //  
        }
        //Enables the relevent fields for the chosen vessel configuration.
        vesselConfigurationSetup();
        //Enables the height from the ocean input fields if the corresponding downrigger location is chosen.
        OceanHeightTextfieldEnablerSwitch();
    }//GEN-LAST:event_starboard_aft_checkboxActionPerformed