"Bob Gardner" wrote

The air-to-air freqs you refer to are not used in oceanic
airspace...all transoceanic flights are talking to the
appropriate oceanic controller on his/her discrete frequency.
Use of this freq for plane-to-plane is not kosher, but not
unusual, either.

For the 25 years that I flew trans-oceanic, whether the FAA or
FCC approved it or not, 123.45 WAS Oceanic Common. I suspect
that it still is. Not too many Radio Cops out there. :-)

Bob Moore