Paul Tomblin wrote:

In my FAA data, TAPPA and VIPKE are both classified as "REP-PT" with
almost the same latitude and longitude (37.97019333, 76.8446166 versus
37.970336111, 76.844478). However, in the DAFIF data TAPPA is classifed
as "NAMED FIX" and VIPKE is classified as "UNNAMED, CHARTED OR COMPUTER
NAV FIX".

In case you're wondering, the distance between those 2 points is 65
feet, 7 inches, or just less than the wingspan of a CRJ-200.