B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
  1166 to   1168
  1171 to   1173
  1175 to   1178
  1178 to   1183
  1183 to   1186
  1186 to   1193
  1193 to   1196
  1197 to   1201
  1235 to   1237
  1336 to   1338
  1353 to   1355
  1560 to   1562
  1567 to   1570
  1575 to   1577
  1643 to   1645
  1689 to   1691
  1733 to   1735
  1743 to   1745
  1763 to   1765
  1779 to   1781
  1821 to   1823
  1886 to   1888
  2228 to   2230
  2230 to   2232
  2234 to   2236
  2410 to   2412
  2569 to   2571
  2596 to   2598
  2646 to   2648
  2790 to 982027
982033 to 982035
982035 to 982037
982042 to 982044
982056 to 982058
982061 to 982063
982071 to 982073
982087 to 982089
982095 to 982097
982102 to 982104
982109 to 982111
982140 to 982142
982153 to 982155
982169 to 982171
982669 to 982671
983082 to 983084
983432 to 983434
983790 to 983792
983862 to 983864
984283 to 984285
984613 to 984615
985017 to 985019
985223 to 985225
985792 to 985794
986574 to 986576
986815 to 986817
986838 to 986840
986855 to 986857
986903 to 986905
986918 to 986920
986987 to 986989
987112 to 987114
987118 to 987120
987660 to 987662
988037 to 988039
988138 to 988140
988194 to 988196
988376 to 988378
988439 to 988441
988463 to 988465
988593 to 988595
988654 to 988656
988656 to 988658
988869 to 988871
989133 to 989135
989137 to 989139
989145 to 989147
989173 to 989175
989212 to 989214
989570 to 989572
989817 to 989819
989971 to 989973
990306 to 990308
990475 to 990477
990478 to 990480
990557 to 990559
990704 to 990706
990747 to 990749
990839 to 990841
990846 to 990848
990896 to 990898
990930 to 990932
990938 to 990940
990992 to 990994
991030 to 991032
991084 to 991086
991100 to 991102
991211 to 991213
991214 to 991216
991226 to 991228
991238 to 991240
991339 to 991341
991353 to 991355
991365 to 991367
991370 to 991372
991493 to 991496
991497 to 991499
991540 to 991542
991545 to 991547
991548 to 991550
991557 to 991559
991560 to 991562
991762 to 991764
991777 to 991779
991783 to 991785
991786 to 991788
991880 to 991882
991916 to 991918
991926 to 991928
991936 to 991938
991950 to 991952
991964 to 991966
992122 to 992124
992321 to 992323
992338 to 992340
993017 to 993019
993024 to 993026
993257 to 993259
993295 to 993297
993343 to 993345
993346 to 993348
993385 to 993387
993409 to 993411
993415 to 993417
993420 to 993422
993423 to 993425
993446 to 993448
993461 to 993463
993464 to 993466
993467 to 993469
993485 to 993487
993521 to 993523
993528 to 993530
993551 to 993553
993557 to 993559
993586 to 993588
993601 to 993603
993701 to 993703
993703 to 993705
993815 to 993817
993840 to 993844
993845 to 993847
993847 to 993849
993857 to 993859
993874 to 993876
993883 to 993885
994050 to 994052
994086 to 994088
994107 to 994109
994110 to 994112
994116 to 994118
994125 to 994127
994127 to 994130
994131 to 994133
994140 to 994142
994143 to 994145
994155 to 994157
994158 to 994160
994448 to 994450
994451 to 994453
994471 to 994473
995943 to 995945
996273 to 996275
996674 to 996677
996677 to 996679
996738 to 996742
996743 to 996747
996747 to 996759
996760 to 996764
996769 to 996789
996789 to 996791
996792 to 996796
996797 to 996799
996801 to 996803
996852 to 996854
997062 to 997064
997171 to 997173
998154 to 998156
998833 to 998835
999215 to 999217
999328 to 999330
999389 to 999391