So I was watching AC4 gameplay and noticed that the Typhoon was numbered 118^04. This caught my attention, so I came to the wiki page and saw that the Aircraft # is listed as 118. Then I checked Talisman, Shamrock and Avalanche and all of them have "none; squadron number used."
And I can't read Japanese, but the model kit cited also has 04 decals, so is the Aircraft # of Mobius 1, when applicable, in fact 04? (Or just "none.")