Continuity mistake: When PT 109 crashes into the hut at the end of the wharf it is doing about three knots. The shot before (across the stern) shows the wake of a boat doing about 35 knots. When the boat actually hits, a sailor falls over, the wrong way for someone caught by inertia and at the same time, on the port stern bollard, you can see a line fastened and leading ashore. The boat is supposed to be moving alongside the wharf off to starboard: (a) there is nowhere for that line to be fastened to, and (b) the boat is supposed to be still underway.
Factual error: All of the PT boats in this film are painted in the same Navy Gray used by larger warships of the US Navy in WWII. However, the real PT 109 and the other PTs in its squadron were painted green in order to better blend into their daytime anchorages or moorings near island jungles. The common green color scheme of this period was designated as "Design 5P" and incorporated Navy Green over a base coat of Ocean Green.Charles Austin Miller