Back in the states, '93-ish, as our C-130 fleet had been upgraded to SCNS & we were now RNAV equipped. On long route back from McChord RTB Little Rock in the middle of the night,
ATC: "Horse XX, you're cleared present position direct Little Rock."
C-130: "XX center, we'll fly our flight planned routing."
ATC: "It says you're RNAV equipped..."
C-130: "We are, but our nav is asleep!"
ATC: "....err...roger."
As a young Co, I thought that was the most brilliant call I'd ever heard from a Capt!