B-mode gaps (or duplicate numbers) in sounding sequence: (The soundings numbered below exist, gaps are in between), 42011 to 42013 42678 to 42680 42687 to 42689 42987 to 42989 43496 to 43498 43973 to 43975 44132 to 44134 44698 to 44700 44926 to 44928 45179 to 45181 46128 to 46130 46840 to 46842 47326 to 47328 48041 to 48043 48062 to 48064 49168 to 49170 50345 to 50347 50350 to 50352 50840 to 50842 51866 to 51868 52390 to 52392 52730 to 52732 53242 to 53244 53394 to 53396 53490 to 53492 53494 to 53496 53623 to 53625 53635 to 53637 53641 to 53649 53650 to 53652 53724 to 53726 53936 to 53938 54200 to 54202 54336 to 54338 54374 to 54376 54382 to 54384 54667 to 54669 54671 to 54673 55364 to 55366 55969 to 55971 56014 to 56016 56016 to 56018 56018 to 56020 56022 to 56024 56026 to 56028 56043 to 56046 56046 to 56048 57226 to 57228 57271 to 57273 57541 to 57543 57624 to 57626 58323 to 58325 58470 to 58472 59264 to 59266 59268 to 59270 59272 to 59274 59687 to 59689 60122 to 60124