In Fallout 4, which type of power armor is first encountered in the early mission "When Freedom Calls" in a crashed Vertibird?

The first type of power armor encountered in the early mission "When Freedom Calls" in Fallout 4 is the T-45. This is seen during the quest when the player character arrives at Concord and witnesses a Brotherhood of Steel knight battling against a group of raiders in a crashed vertibird. The knight is wearing the T-45 power armor, making it the first type encountered in the game.