B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
  2569 to   2571
  2596 to   2598
  2646 to   2648
  2792 to   2794
  2814 to   2816
  3002 to   3004
  3271 to   3273
  3333 to   3335
  3343 to   3345
  3352 to   3354
  3361 to   3363
  3364 to   3366
  3377 to   3379
  3381 to   3383
  3411 to   3413
  3485 to   3487
  3497 to   3499
  3554 to   3558
  3560 to   3563
  3564 to   3566
  3566 to   3588
  3588 to   3590
  3597 to   3599
  3600 to   3602
  3602 to   3604
  3607 to   3609
  3617 to   3619
  3701 to   3703
  3850 to   3852
  4228 to   4230
  4479 to   4481
  5034 to   5036
  5171 to   5173
  5366 to   5368
  5384 to   5386
  5494 to   5496
  5967 to   5969
  5985 to   5987
  6054 to   6056
  6197 to   6199
  6303 to   6305
  6723 to   6725
  6735 to   6737
  6864 to   6866
  7123 to   7125
  7365 to   7367
  7368 to   7371
  7372 to   7374
  7393 to   7395
  7397 to   7399
  7446 to   7448
  7462 to   7465
  7468 to   7470
  7471 to   7475
  7477 to   7479
  7480 to   7482
  7482 to   7485
  7486 to   7488
  7488 to   7490
  7490 to   7493
  7494 to   7497
  7501 to   7503
  7512 to   7514
  7517 to   7519
  7521 to   7523
  7530 to   7532
  7552 to   7554
  7659 to   7661
  7706 to   7708
  7928 to   7930
  7943 to   7945
  7974 to   7976
  7990 to   7992
  8084 to   8086
  8105 to   8107
  8132 to   8134
  8169 to   8171
  8226 to   8228
  8241 to   8243
  8254 to   8256
  8292 to   8294
  8307 to   8309
  8324 to   8326
  8684 to   8686
  8705 to   8707
  8879 to   8881
  8966 to   8968
  9050 to   9052