B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
837389 to 837391
837888 to 837890
838584 to 838586
838978 to 838980
839784 to 839786
840081 to 840083
840107 to 840109
840115 to 840117
840117 to 840119
842819 to 842821
842944 to 842946
843638 to 843640
844656 to 844658
844729 to 844731
846829 to 846831
846889 to 846891
847901 to 847903
848580 to 848582
848620 to 848622
850184 to 850186
851029 to 851031
851348 to 851350