A new theory just occurred to me. Now please bear with me as I try and explain it. I'm thinking the Titanic was at a semi-shallow angle, maybe 50-55°. The stern began to break but not completely, causing the ship's lights to go out and with it a large almost explosive sound. The ship then goes to a 90° angle. The ship is still semi-intact as she disappears from view, settling back on the way down. The ship is still settling back as she picks up speed right after disappearing. The speed of the ship, weight of the stern, and other components cause a final and violent separation and both sections go their separate ways. This theory would explain many conflicting accounts (Thayer, Lightoller, etc.) and explains the missing 100 feet and the collapsed part of the bow.
Hello, Lights, Are you warm?