Frank Bell is incorrectly informed by his father Chief Engineer Joseph Bell that you have to be 16 years old to work on a White Star Line ship. In fact 2 members of Titanic's crew were aged just 14. Neither of them survived the sinking.
As the electricians are consulting the blueprint schematics, we can see transistor symbols here and there. Yet, the first functional transistor was only invented in 1947 by John Bardeen, Walter Brattain and William Shockley.