One key element might be the destination. In a 'across the waters true story', the place that the characters are aiming for is often crucial. It could be a promised land, a new home, or a place of refuge. Another element could be the means of crossing. Was it by boat, raft, or some other form of watercraft? And the events that occur during the crossing, such as storms, sightings of other vessels, or encounters with marine life, are also likely to be important aspects of the story.
The 'across the waters true story' could potentially be about a historical event. For example, it could be about the voyages of early explorers who crossed the seas to discover new lands. It might also be about refugees or immigrants who had to brave the waters to reach a new place in search of a better life. Without more context, it's difficult to say exactly what it's about.
Sort of. While the core of the story in Dark Waters has roots in real-life incidents, some elements might have been dramatized or fictionalized for cinematic effect.
Grace Waters is purely fictional. The story was made up by the author's imagination and doesn't draw from actual happenings. There are no real-life equivalents or inspirations for it.