Changing geography to suit the narrative

There was a point where there was a flashback to Jerusalem being overrun by the Ottomans. The problem is that three Templars apparently escaped by boat when Jerusalem is landlocked. There is no river, lake, sea or ocean anywhere near Jerusalem where they could have slipped away using any boat. It might have been an exciting sub-story that the Templars had to survive until they reached the Mediterranean, but in the rush to tell a story, the geography of the Holy Land had to be changed to suit the narrative.