Factual error: When the UBoat changes course, Andrews, operating the radar repeater, is immediately able to provide the bridge with the target's new course and speed. This would be impossible without extensive calculations and at least range and bearing plots once the target has steadied up on the new course, either figured on the scope screen or on a maneuvering board. One must remember that both vessels' courses and speeds must be taken into account when making computations, and the relative direction of a target's travel most often is not its true course.
The Enemy Below (1957)
1 factual error
Directed by: Dick Powell
Starring: Robert Mitchum, David Hedison, Theodore Bikel, Curd Jürgens
Factual error: When the UBoat changes course, Andrews, operating the radar repeater, is immediately able to provide the bridge with the target's new course and speed. This would be impossible without extensive calculations and at least range and bearing plots once the target has steadied up on the new course, either figured on the scope screen or on a maneuvering board. One must remember that both vessels' courses and speeds must be taken into account when making computations, and the relative direction of a target's travel most often is not its true course.
Captain Murrell: I have no idea what he is, what he thinks. I don't want to know the man I'm... trying to destroy.
Trivia: The number of the (fictional) USS Haynes is DE-181. This number was actually used for the USS Straub - an actual Cannon Class escort destroyer.