I’ve been trying to remember the name of this movie for a while but I can’t and google doesn’t help. The plot is this.
A woman is trapped on a bat and is forced to relive death after day only to wake up with scars from her previous death on her body. I think there is a skeleton on the boat as well. She finds a device on the boat that clues her in to where she is. Eventually she figures out she as framed and convinces whatever entity is holding her there to let her go and find the person who set her up. She goes free and finds the woman as she’s getting in her car and throws the device from the boat trapping the other woman in car doomed to die over and over again. I think the last thing shown is the first woman waving at her as she realizes what’s about to happen.
I have tried using google over and over again with variations of the this plot but the main result I get is Triangle, and it’s not Triangle.