B-mode gaps (or duplicate numbers) in sounding sequence: (The soundings numbered below exist, gaps are in between), 614789 to 619548 619664 to 619666 619666 to 619668 619668 to 619670 619672 to 619674 619674 to 619676 619684 to 619686 619688 to 619690 619907 to 619909 619953 to 619955 619964 to 619966 619969 to 619971 619971 to 619973 619973 to 619975 619977 to 619979 619979 to 619981 619981 to 619983 619985 to 619987 619991 to 619993 619995 to 619997 619999 to 620001 620001 to 620003 620007 to 620009 620011 to 620013 620013 to 620015 620020 to 620022 620775 to 620777