B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
 13682 to  13682
 13683 to  13683
 13686 to  13686
 13687 to  13687
 13688 to  13688
 13689 to  13689
 13690 to  13690
 13691 to  13691
 13692 to  13692
 13693 to  13693
 13694 to  13694
 13695 to  13695
 13696 to  13696

These are B modes of the same number but some are *.b_g
while others are *.b_t