When he appears, Glenn Ford has nothing on his collar but in the CO's office Ford has lieutenant JG bars. As an oft-proclaimed naval reserve officer, Ford should've noticed.
When Pratt is climbing the ladder while working on the Officer's Club and falls backward, he lands underneath the window frame he had been carrying. When the camera returns to him a few seconds later, he is now lying on top of the frame.
Ship's bells in the Navy ring every 30 minutes. The duration between the ringing of two and three bells during the staff meeting is four minutes in a scene that plays out in real time without a break.
When Ensign Tyson (Russ Tamblyn) first proclaims he's an ensign, he is clearly wearing silver bars, the insignia of a lieutenant, junior grade. An ensign wears gold bars--known familiarly as "Butter Bars."
It appears that Farragut Jones has his insignia, commonly called his crow, on the wrong sleeve. However, during the time period of this movie (WWII) Navy enlisted rates were worn on either sleeve. Original ratings such as Boatswain and Gunners Mates were "right sleeve" rates and later ratings were "left sleeve" rates. The sailor in question seems to be a Yeoman (admin ass't person) so he is correct wearing his rating on the left sleeve. This was changed after WWII and today all enlisted sailors wear their rating on the left sleeve.
When Adam Garrett (Earl Holliman) is leaving for sea duty, the transport plane that's taking him away is marked with a post-World War II fuselage insignia (red stripes in the white bars to either side of the white star on a blue disk).
The extensive use of 16mm standard ratio battle footage, stretched and enlarged to CinemaScope proportions was an unfortunate mistake on the part of some budget-minded participant in the production.
The man wearing a Braves cap is NOT wearing a Milwaukee Braves cap. The letter on the cap is a "B", NOT a "M". Therefore, the criticism claiming that the Milwaukee Braves cap is an anachronism is erroneous. The cap is in fact a Boston Braves cap, and during World War II, the Braves were indeed located in Boston, hence the white block "B".
During the sequence where they're building the recreation hall, one of the guys taking part in the construction is seen wearing a Milwaukee Braves baseball cap. The Braves didn't move from Boston to Milwaukee until 1953.
Despite the mid-1940s WWII setting, all the women's hair styles, clothing, and uniforms are strictly 1957.
The Pittsburgh Pirates cap that Glenn Ford is wearing was not adopted until 1948 (which looks just like the modern all black with the yellow Pirates "P" that they wore in 2021). In the late 1930's, the Pirates had a blue cap with a red "P." In 1940, the Pirates changed the road cap by making the "P" white. In 1941, the Pirates changed the bills to red for both the home and road caps. Then for the war years (1942-1945) both the home and road caps became all blue again, with a white "P." In all of these caps, the "P" is a "wishbone" "P." The foot of the spits and tappers off, while on the left side of the "P" spikes jut out from where the circle part of the "P" connects to the trunk. Then on the right side of the "P" there are spikes on both the inside and outside of the circle of the "P." If service men in were to wear a Pirates cap during the war, it would most likely have been one of these blue caps.
Several times a buoy is seen in the lagoon bobbing back and forth as a bell sounds. It is a simple can buoy and not a much larger buoy with a mounted bell.
When the ship is at battle stations, even the Admiral should be in battle dress.