The Boat That RockedGoofs
Angus tells Carl about every second Saturday, where each DJ is allowed to invite one girl onto the boat. He then asks Carl who he will be inviting onto the boat, though Carl is not a DJ. Then the Count is also seen with twins, breaking the one girl rule. And Harold, the producer seen for a lot of the shows, is seen greeting a girl.
In one scene, some of the DJs are clinging to the rail on the deck of the sinking ship to keep from sliding down the deck. In a later scene, three of the DJs are standing upright in the studio and not leaning like they would be if the ship were sinking at a 45 degree angle. Also, the water in the studio is level as if the ship were sinking levelly.
Crew or equipment visible
Errors in geography
The Boat is sinking at a position given as 53 degrees 17 minutes North and 2 degrees 15 minutes East - which is a position 70 km Northeast of Bacton in Norfolk, (the nearest town on land) - however Gavin is requesting anybody with a boat in Suffolk to help with the rescue. Suffolk is a long way to the South and he would do better to ask for help from anyone in Norfolk.
Smooth Bob gives a message for Carl to tell his mother that "Muddy Waters Rocks" and vocalizes the familiar riff from "Mannish Boy", Waters's 1955 hit song. When Carl gives this message to his mother she mistakes it for Bob revealing to Carl that he is his father, meaning the song or Waters must have reference to Carl's conception in some way. As the film is set in 1966 and Carl is 18, this would place that moment at at least 1948, long before his fame and seven years before "Mannish Boy" was released.
Simon's wedding to Elenore was not legitimate. Contrary to belief a ship's Captain cannot marry anyone unless he is a minister, a magistrate or a judge. Even if a Captain could perform marriages at sea, the wedding still wouldn't be legal as Quentin was the one officiating at it, he was not the Captain of the vessel.
The characters frequently use vernacular that was not made popular until much later than 1966. Characters refer to protection as 'condoms,' which were much more commonly called 'Johnnies' in the 60s. Also, Young Carl is told that when dealing with Thick Kevin, it was important to "think outside the box," a term not coined in general use until the early 90s.
When Rhys Darby's character Angus is first introduced, He has a modern pair of "Panasonic" headphones on. At the time, Matsushita Electric Industrial Co. commercialized its products throughout Europe under the "National" branding. The "Panasonic" branding, introduced in Japan as a brand for audio speakers and introduced as Matsushita's main branding for its consumer electronics in the United States six years later, was not used in Europe until 1980.