she went down on her first voyage with heavy loss of life.请问

go down:sink-----在这里指：泰坦尼克号的沉没
on her first voyage 处女航,首航
这里的on,应该是固定用法,跟first.
比如说,on his first filght他的第一次飞行,on her first attempt她的第一次尝试.
文中指,她在首航便沉没了,损失惨重,造成大批人员的死亡.