The pastor mentions the main character from the biblical "book of Jonah" as Jonas, instead of Jona(h).
When mentioning the Book of Jonah the pastor talks about the whale fish. However a whale is not a fish, it's a mammal, while the bible tells about a huge fish.
When the pastor and the captain are talking via Flag Semaphone his second line starts with a Y. However when the captain reads the line the first letter in the sentence is an N (in German). However it looks similar to the sign for letters in general. Also a signal with crossing arms, which the pastor did later, doesn't exist. Furthermore the beginning of the sentence usually begins by swinging the flag to the right, just like the confirmation of the message receiving, which both wasn't done here.