description Knock John Overview
Knock John is a sandbank in the outer Thames Estuary off the coast of southeastern England. During the Second World War, the Knock John naval sea fort was constructed there as part of the Maunsell fort system used to defend shipping routes and the Thames approaches from German aircraft. The surviving offshore structure consists of concrete towers connected above the waterline by a platform.
help Knock John FAQ
What is Knock John?
Knock John is a sandbank in the outer Thames Estuary off southeastern England. During the Second World War, a naval sea fort was built there.
What was the Knock John sea fort used for?
The fort formed part of the Maunsell fort system used to defend shipping routes and the approaches to the Thames. Its purpose was to help protect the area from German air attack.
Where is Knock John located?
Knock John lies in the outer Thames Estuary off the coast of southeastern England. It is a sandbank rather than a conventional island.
When was the Knock John fort built?
The naval sea fort was constructed during the Second World War. It belonged to the Maunsell fort system established for coastal defense.
explore Explore More
Similar to Knock John
ui.x_see_all arrow_forward
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
