I have a question as well: what (if any)is the difference between Baptism by immersion and/or Baptism by submersion?
We'll, I would think we want our babies to come back out of the water rather quickly!
But seriously, it was my understanding that with the reintroduction of the full Rites of Initiation, at least in the Ruthenian Church, that Baptism by full immersion was preferred and strongly encouraged, but not fully mandated.
FWIW - my children and their cousins (all cradle Byzantines) were born just after the full Rites of Initiation were restored in the Eparchy of Passaic. Of the five, only one was baptized via full immersion - my niece and goddaughter. The funny part of the story: she was initiated by a bi-ritual priest, serving as pastor of my former home parish at that time, who went "by the book" and "dunked her head to toe" (much to the astonishment of my sister-in-law)!