Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Q: Context : British Marine Air Navigation Co Ltd was formed in 1923 in a joint venture between Supermarine and Southern Railway (owners of Southampton Docks), the Woolston base becoming Britain's first commercial flying boat base, with its own Customs and Immigration facilities.
Question : What is British Marine Air Navigation Co Ltd's parent company?
A:
Supermarine