52- my only recollection as to CO's operation says it's almost certainly an intrastate tag to FLL ... I have come up with eight possibilities, but since I **really** don't want to play the one-at-a-time guessing game again I'll ask for jlemon's indulgence to narrow the field on the basis of distance if the two nearest ones are wrong ... we've talked many times about the 21-mile hop from Miami/MIA over the years, but I think West Palm Beach/PBI (at twice that) would be slightly more viable in 1987