B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
  4469 to   4472
  7685 to   8599
 12273 to  12275
 16651 to  16653
 16655 to  16657
 16664 to  16666
 16677 to  16679
 16686 to  16688
 16695 to  16697
 16722 to  16724
 16727 to  16729
 16741 to  16743
 16750 to  16752
 17831 to  17845
 20002 to  20008
 20205 to  20208
 20212 to  20214
 20379 to  20381
 20465 to  20467
 20467 to  20469
 20556 to  20558
 20560 to  20562
 20562 to  20564
 20652 to  20656
 21267 to  21276
 21363 to  21365
 21612 to  21617
 22053 to  22055
 22064 to  22066
 23606 to  23616
 24666 to  24668
 24887 to  24889