B-mode gaps (or duplicate numbers) in sounding sequence:
(The soundings numbered below exist, gaps are in between),
663926 to 663928
664266 to 664268
664624 to 664626
664680 to 664682
664700 to 664702
665336 to 665338
665342 to 665344
665568 to 665570
666025 to 666027