Continuity mistake: When the Seagrass is attacked, the two girls are thrown through the cabin's rear windows, landing on the outside deck. When the boat's owner finds it, a camera circles the Seagrass from a distance and the rear windows are intact. When he and Elizabeth board the boat, the windows are again broken. (00:26:40 - 00:42:15)
Continuity mistake: As Stevie's car settles to the ocean bottom, an exterior shot looking at the front/driver-side shows her door mirror is missing. But when she wakes up and looks around, the mirror is on the door. (01:16:20)
Continuity mistake: When Nick is driving Elizabeth home, he mentions buying her a ring. The steering wheel is the standard hard plastic type found on trucks of it's era. When the glass shatters and the truck comes to a halt, the wheel is suddenly padded with a black, aftermarket wrap. (00:22:10 - 00:22:45)
Continuity mistake: Stevie's radio station is shown located in a lighthouse, yet the night shot early in the film shows an entirely different lighthouse than is seen in daylight mid-way through the film. The later version's top, red portion isn't nearly as tall, and it has at least a third of its glass replaced with solid panels, while the earlier one is taller and all glass. (00:13:35 - 00:47:35)
Visible crew/equipment: As Stevie's car sinks, it tilts slightly to the right. On the driver-side rear quarter panel, a wireless mini-camera is attached to the car, pointing forward. (01:16:00)
