B-mode gaps (or duplicate numbers) in sounding sequence: (The soundings numbered below exist, gaps are in between), 640039 to 640041 640079 to 640081 640083 to 640085 640085 to 640087 640087 to 640089 640091 to 640093 640093 to 640095 640095 to 640097 640097 to 640099 640099 to 640101 640101 to 640103 640107 to 640109 640109 to 640111 640111 to 640113 641243 to 641245 641552 to 641554 641560 to 641562 641562 to 641564 641564 to 641566 641570 to 641572 641572 to 641574 641574 to 641576 641576 to 641578 641578 to 641580 641580 to 641582 641582 to 641584 641584 to 641586 641586 to 641588 641588 to 641590 641590 to 641592 641592 to 641594 641594 to 641596 641596 to 641598 641598 to 641600 641600 to 641602 641602 to 641604 641604 to 641606 641632 to 641634 641634 to 641636 641789 to 641791 641791 to 641793 641793 to 641795 641795 to 641797 641797 to 641799 641799 to 641801 641801 to 641803 641803 to 641805 641805 to 641807 641807 to 641809 642127 to 642129 642131 to 642133 642135 to 642137 642137 to 642139 642141 to 642143 642143 to 642145 642147 to 642149 642149 to 642151 642153 to 642155 642155 to 642157 642403 to 642405 642792 to 642794 642838 to 642840 643250 to 643252 643256 to 643258