美飞行员发射飞弹时为什么要喊FOX 2 之类的话

FOX - Air-to-air weapons employment.//使用空对空武器
Fox one - A radio call from a friendly aircraft announcing that he is

firing a Semi-Active Radar Guided Missile.//通知友机正在发射半主动雷达

制导导弹
Fox Two Mike - A radio call from a friendly aircraft announcing that he

is firing an AIM-9M Sidewinder.//通知友机正在发射AIM-9M(响尾蛇)导弹
Fox Two - A radio call from a friendly aircraft announcing that he is

firing IR Guided Missile such as an AIM-9P Sidewinder.//通知友机正在发

射发射红外导向空对空飞弹，例如AIM-9P响尾蛇导弹
FOX THREE - launch of AMRAAM/Phoenix missile.//发射先进中距空空导弹

什么叫狐狸-2？

也许 第一位仁兄的是对的

FOX 是飞机编队的名字,后面的号码是飞机的编号
像中国的什么呼叫"黄河"长江"地瓜"红薯"之类的东西.
我自己的猜测哦