[CQ-Contest] When is Skimmer not a Skimmer?

[Kenneth Silverman]

N6TR writes on 3830:

>During the second morning, I hooked up my SDR-IQ and CW Skimmer with the
>decoding off the screen.  This is a very effective way to keep an eye on
the
>rest of the band while CQing.  You can even "read" code of most of the
stations
>by looking at the waterfall display.  This is considered "single-op" as it
is
>basically a panadapter with waterfall display (no CW decoding).  (snip)

This sure is a fine line, and to me goes against the spirit of the rules.
Is this really accepted under the ARRL, CQ etc rules?

Kenny K2KW