Some of this is rather misleading:
11840 does not replace 17720; it replaces 13680 in B-13
11670 does not replace 17720; it replaces 13680 in B-13 (when after 2200)
13740 does not replace 17705, which was not in use in B-13 (nor I think is
13740 yet in A-14)
11670 at 23-04 is not a NF and
Some of this is rather misleading:
11840 does not replace 17720; it replaces 13680 in B-13
11670 does not replace 17720; it replaces 13680 in B-13 (when after 2200)
13740 does not replace 17705, which was not in use in B-13 (nor I think is
13740 yet in A-14)
11670 at 23-04 is not a NF and
