Throughout the movie, the ship commander is discussing with General Bradley military plans and strategies over an open radio broadcast for the enemy to hear. Such a huge lack of security would never have occurred in reality.
This movie is set in 1943. General Bradley in the movie is seen with four stars on his helmet. He did not get promoted to a four-star general until March 12, 1945.
13 minutes into the movie, a sailor in his bunk is seen reading a book titled "Battle Below". This book is about exploits of U.S. submariners in the Pacific during World War II. While it was indeed written in 1943, it was heavily censored by the U.S. Navy, and not published until 1945, after the war ended. Impossible for a person during the war to have a copy.
Movie is called "Rebels of PT-218", however, the entire movie is of a totally different vessel called the SS Lawton B. Evans. Two different boats, serving in different theaters of war.
In the movie, General Omar Bradley is giving commands to the SS Lawton B. Evans. This never happened. General Bradley was in charge of land forces and not the navy.
E. Roberts wears modern Ray Ban spectacles.
When the sailors are firing their machine guns on deck, there is no recoil when fired.
A U.S. flag seen in the background in a few scenes has the present number of 50 stars, not 48 stars at the time of the second world war.
the coffee pot in the mess shown is a modern drip pot.
An overweight Gen./Maj. Gen. Bradley is wearing a 1970s-1990s green US Army class A jacket with some sort of weird yellow stripe on the sleeve, and four big dumb plastic-looking toy stars not centered on the front of his helmet. Not only are these incorrect, but he would not have been wearing a helmet with Army office attire.
At 18:40 mark, a cast member states: "The moon is not going to rise for a couple of hours, the bastard will never see us." It is clearly daylight.