Although the name of the Navy ship on which Danny Williams is placed undercover is supposed to be "The John Haskell" when McGarrett is later transferred to that ship, its real name, "The Whipple", is clearly visible on the stern.
McGarrett is seen arriving aboard ship in a navy commander's uniform. He is later seen wearing the uniform of a navy lieutenant commander.
When Danny reads the information on Woodley after he has died, he is identified as a damage controlman, seaman first. Woodley was wearing red stripes on his uniform, which correctly identifies him as working in engineering. Woodley should have been identified by Danny as a fireman, not a seaman.
The hair length of the enlisted men characters are not Navy regulation.
- At time of filming, the US Navy had different grooming standards. The Navy also frequently tolerated longer hair while underway. However regulations were enforced for those going ashore.
Petty Officers arm patches have one to three downward pointing chevrons (two lines forming an arrowhead) indicating the rank. Directly above them is an insignia indicating the rate, such a boatswain's mate, electronics technician, radioman, etc. Above that is the Eagle. None of the sailors had the insignia for their rates. In addition, dozens of sailors had no patches of any kind indicating their ranks and rates on the sleeves of their uniforms.
When Danny reads Woodley's record to Steve, he identifies him as a "Seaman First". There is no such rank in the navy. The correct ranks would have been: Seaman Recruit (1 stripe), Seaman Apprentice (2 stripes) and Seaman (3 stripes).
To catch the dopers, Danno hides a camera near the stash - as close as a foot away. The point of view of the images received on their surveillance monitors are from a camera positioned much further away. Another impossible feat occurs when the camera provides multiple points of view around the hidden stash. This just couldn't happen with a single stationary camera.
The Sony black and white monitor Danny was using for surveillance of the fire extinguisher had no connections to the inputs on the back, yet there was not only a picture, but it was in color as well.