The Wonkatania with Jack
Willy Wonka and the Chocolate Factory 1971
The jack of the HMS Wonkatania is a blue swallowtail flag with a letter W. The letter W is white and in a matching font of the Willy Wonka chocolate factory corporation.
Wonka and guests arriving at the destination
The flag of the HMS Wonkatania does not flutter. It is made of a stiff material to appear as if it is blowing in the wind.