Yes, it certainly is. And it is free! I use it all the time. I recently found a picture of my father in a West Australian newspaper in 1941, on his way to war from Sydney (he was captured when Singapore fell in 1942). He mentioned in a letter home about the picture which one of the other soldiers had been sent from home.
I might have looked on Trove for a Fremantle arrival date, but I didn’t really think of it for an English departure date.