Well the F-23 was a Northrop Grumman fighter called the Black Widow which supposedly never moved forward losing out to the F-22. Might have been compromised or so good it was kept under wraps. Two protos built for the testing (Black Widow II and Grey Ghost). Supposedly really stealthy.
Then of course there is the MIG-23 Flogger which is kinda dated.
Was looking for an experimental X-23 of some type but couldn’t find anything.
Can’t think of any ships/missles/torpedoes/etc that have -23
Maybe a rocket - anyone know?
23 is the number of chromosomes humans have in their cells.
And I have no idea whatsoever how that could actually apply to any of this.