USS John B. McKay (NCC-653) was a Gagarin-class science scout on active duty in Starfleet from at least 2286 to 2295. (Starfleet International: USS John B. McKay) John B. McKay was deployed to the Starfleet First Fleet during its operational lifetime. Her commanding officer, in 2288 at least, was Captain Thomas Monaghan. (Star Trek: Avenger: "Operations Log -- USS Avenger")