Yet another nostalgia button pressed!!
IRIS were the bane of 'siggies's' lives. On the prowl world-wide, listening out for radio ops not strictly 'to the book'. One such, possibly apocryphal, featured a bad-tempered air/ground exchange which was terminated. from the air. by a series of initials. This was logged by IRIS and the culprit was hauled in to explain the obscene transmission. His response was that he had merely been abbreviating the complimentary close 'see you next trip' !! (If you are confused, combine the sound of the first two with the last two initials)
Memory says that the offender got away with a severe bollocking - memory has been known to be wrong!